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Plastic food packaging

May 9, 2024 By EarthWise Leave a Comment

Reducing the use of plastic is an important environmental goal.  Plastic is made from fossil fuels and plastic pollutes the land and the oceans.  It is estimated that 40% of plastic waste comes from packaging.  Plastic packaging is extremely common in the supermarket and there is a growing desire to reduce its use.  But it isn’t that easy.

Plastic packaging works well to slow the decay of vegetables and fruit.  Its use results in less produce being tossed into the garbage, where it creates almost 60% of landfill methane emissions.  In fact, food is the most common material in landfills.  The average American family of four spends $1,500 a year on food that ends up uneaten and nearly half of all household food waste is fruits and vegetables.

Products like bagged salads, berries in plastic clamshells, and plastic sealed potatoes and cucumbers are popular with shoppers because they stay fresh longer.  They are popular with grocers because the items don’t have to be weighed.  But all these things result in plastic waste.  It is a tradeoff that is difficult to make between food quality and safety vs. the environmental harm caused by plastic.

There are a variety of alternatives to plastic packaging of food that are being explored.  They range from biodegradable, organic coatings that can take the place of plastic films, to cardboard and paper produce packaging. 

But practically, there is yet no affordable and biodegradable plastic alternative that keeps fruits and vegetables safe and fresh.  Solving the food packaging problem is not easy.

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So Much Produce Comes in Plastic. Is There a Better Way?

Photo, posted July 1, 2007, courtesy of Brian via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Does vertically-grown food taste different?

January 2, 2024 By EarthWise Leave a Comment

Vertical farming is a method of producing crops in vertically stacked layers or surfaces typically in a skyscraper, used warehouse, or shipping container.  Modern vertical farming uses indoor farming techniques and controlled-environment agriculture technology. 

Vertical farming has the potential to be one of the solutions to food insecurity in parts of the world where crop production is limited by climate change or other environmental factors.  Vertical farming reduces water and land use, reduces nutrient emissions, and could eliminate the need for pesticides.  It also allows more food to be grown locally and with higher yields.

But some critics of vertically-grown veggies say they look pale, artificial, and taste bland.  In the first study of its kind, a research team led by scientists from the University of Copenhagen in Denmark sought to investigate whether these consumer prejudices hold true.

The research team asked 190 participants to blind taste test arugula, baby spinach, pea shoots, basil, and parsley grown in vertical farming and compare the taste and appearance to those same leafy greens grown organically in soil. 

Overall, the organic greens grown traditionally narrowly beat out the vertically-grown ones in the study, but it was very close.  For example, when asked to rate arugula on a scale of 1-9 with 9 being best, the participants gave both types a 6.6.  There was no clear winner between basil, baby spinach, and pea shoots.  The only clear winner was organically-grown parsley. 

The study debunks some myths about vertically-grown food and should help pave the way for more widespread adoption of this efficient method to grow tasty and nutritious food. 

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A delicious surprise: Vertically farmed greens taste as good as organic ones

Photo, posted May 11, 2009, courtesy of Cliff Johnson via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

The Spooky Reality | Earth Wise

October 23, 2023 By EarthWise Leave a Comment

According to the National Retail Federation, American consumers will spend a whopping $12.2 billion on Halloween this year, exceeding last year’s record of $10.6 billion.  A record number of people – 73% of Americans – will also participate in Halloween-related activities this year, up from 69% in 2022.  But it’s not just our wallets that take a beating. 

Halloween generates a frightening amount of waste.  Picture all those flimsy and often single-use costumes, polyester cobwebs, plastic-wrapped candy, mass-produced decorations, and so forth. Scary stuff!  Here are some simple tricks to make the holiday more sustainable this year. 

Invest in quality costumes.  Those mass-produced costumes leave the largest carbon footprint from Halloween.  They are often made from non-recyclable plastic and most end up in landfills by mid-November.   By renting, thrifting, swapping, or making your own costumes, many of the negative impacts of dressing up for the holiday can be avoided.

Find environmentally-friendly decorations and supplies.  For example, carve local pumpkins and either save the seeds and flesh to eat later, compost it, or feed it to animals.  Make your own spooky decorations.  If you do buy decorations, ensure that they are durable and reusable.  And use wicker baskets, old bags, or pillowcases when trick-or-treating.

Finally, purchase organic and fair trade candy if you’re able to do so.  Some of the largest candy manufacturers are major drivers of deforestation and species extinction around the globe due to their demand for sugar, palm oil, and cocoa beans.

Together, we can “green” Halloween.  

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Halloween Data Center

Photo, posted November 13, 2019, courtesy of Christian Collins via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Greening Halloween | Earth Wise

October 26, 2022 By EarthWise Leave a Comment

According to the National Retail Federation, Halloween participation is expected to return to pre-pandemic levels this year.  Spending on Halloween festivities by the 69% of Americans who celebrate is expected to add up to $10.6 billion in 2022 – or more than $100 per person – reaching a new record high. 

Halloween generates a mind-boggling amount of waste.  Picture all the flimsy single-use costumes, plastic candy wrappers, mass-produced decorations, and so on.  Here are some tricks to treat you to a greener holiday.

Our first trick is to invest in quality costumes.  Mass-produced (and often single use) costumes leave the largest carbon footprint from Halloween.  They are often made from unsustainable materials, manufactured in countries with poor labor standards, and too many end up in landfills by mid-November. By renting, thrifting, swapping, or making your own costumes, many of the negative impacts of dressing up for the holiday can be avoided.

Our second trick is to invest in environmentally-friendly decorations and supplies.  For example, carve local pumpkins and save the seeds and flesh to eat later.  Make your own spooky decorations.  If you do buy decorations, ensure that they are durable and reusable.  And use a wicker basket, old bag, or pillowcase to trick-or-treat.

Our third trick is to pass out organic and fair trade candy.  Some of the largest candy manufacturers are major drivers of deforestation and species extinction around the globe due to their demand for sugar, palm oil, and cocoa beans.

If you’ve already spent your $100 this year, consider these changes for next year.  It’s never too late to become a superhero.

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Retail Holiday and Seasonal Trends: Halloween

Photo, posted October 14, 2007, courtesy of Brian via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Feeding Cows Seaweed | Earth Wise

July 15, 2022 By EarthWise Leave a Comment

When cows digest their food, they burp, and when they burp, they release methane.  This is called enteric methane and it’s a real problem.  A single cow belches out 220 pounds of methane each year, which is the greenhouse gas equivalent of burning over 900 gallons of gasoline.  That’s more than the average car uses in a year.

Several studies have shown that feeding cows seaweed has the potential to substantially reduce the amount of methane in cow burps.  The latest comes from a trial that took place at the Straus Family Creamery, an organic dairy producer in Marin County, California.

The trial used a new seaweed-derived feed additive called Brominata.  Brominata is made of a red seaweed called Asparagopsis taxiformis.  The addition of the seaweed to the cows’ diets on the Straus farm resulted in an 52% average reduction in enteric methane emissions.  One cow in the study showed a reduction of 92%.

Cutting enteric methane emissions in half would be a huge improvement that would be quite difficult to achieve by convincing enough people to reduce meat and dairy consumption.

The California Air Resources Board has identified feed additives as an emissions-reduction strategy for the dairy industry.  There are now some synthetic feed additives that have been developed that reduce enteric methane, but they haven’tyet  received FDA approval for use in the U.S.  Brominata has been approved as Generally Regarded as Safe by the California Food and Drug Administration.  Whether it and similar seaweed-based feeds can be produced in sufficient quantity and without adverse environmental effects remains to be seen.  But it is an intriguing approach to solving a complicated problem.

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Feeding Cows Seaweed Reduces Their Methane Emissions, but California Farms Are a Long Way From Scaling Up the Practice

Photo, posted November 10, 2015, courtesy of Lance Cheung/USDA via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Computing With Honey | Earth Wise           

April 28, 2022 By EarthWise Leave a Comment

Using honey in computing devices

Researchers are always working to develop faster and more powerful computers.  Some of them believe that the future of computing lies with neuromorphic computers, which are systems designed to mimic the neurons and synapses found in the human brain.

The human brain has more than 100 billion neurons with more than 1 quadrillion synapses or connections among them.  These numbers far exceed anything people have built.  There have been some neuromorphic computer chips made that have the equivalent of more than 100 million neurons per chip, but this is still far less than the number in the brain.  Despite all its complexity, the brain uses vastly less power than a powerful computer.  Some supercomputers use tens of millions of watts to operate; the brain uses around 10 to 20 watts.

Many researchers are searching for biodegradable and renewable ways to make neuromorphic computing components.  Researchers at Washington State University have demonstrated a way to make them using, of all things, honey.  The honey is used to form a memristor, which is a component similar to a transistor that can both process and store data in memory.  The device uses honey processed into a solid form and sandwiched between two metal electrodes.  The organic device is very stable and reliable over a long time.

So far, these devices are on a micro scale – about the size of a human hair.  The researchers want to develop them on a nanoscale, which is about 1/1000 the width of a human hair, and then bundle many millions or even billions together to make a neuromorphic computing system.  Such a honey-based system would be renewable and biodegradable – which, pardon the pun, would be really sweet.

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Honey holds potential for making brain-like computer chips

Photo, posted January 28, 2008, courtesy of Dino Giordano via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Healthy Soil Is Healthy For People | Earth Wise

March 30, 2022 By EarthWise Leave a Comment

Regenerative agriculture is better for people and the planet

A new study by researchers at the University of Washington looked at the impact of regenerative farming practices on the nutritional content of the food that is grown. 

Regenerative agriculture involves farming practices that not only “do not harm” to the land but actually improve it by regenerating and revitalizing the soil.  The practices focus on topsoil regeneration, increasing biodiversity, improving the water cycle, and enhancing ecosystem services.  Examples are soil-building techniques that minimize plowing, the use of cover crops, and the planting of diverse crops rather than monocultures.

The study included 10 farms across the U.S. that followed soil-friendly practices for at least five years. The results were that the crops from those farms had a healthier nutritional profile than the same crops grown on neighboring, conventional farms.  In particular, there was a boost in certain minerals, vitamins and phytochemicals that are beneficial to human health.  Across the board, regenerative practices resulted in crops with more anti-inflammatory compounds and antioxidants.

The participating farms grew one acre of a test crop – peas, sorghum, corn, or soybeans – for comparison with the same crop grown on a neighboring farm using conventional agriculture.  Analysis showed that the farms practicing regenerative agriculture had healthier soils, as measured by their organic matter – or carbon – content and by other tests. 

Organic farms avoid chemical pesticides, but they operate with a variety of farming processes.  Nonetheless, they have also been found to produce crops with higher levels of beneficial nutrients.  The biology of the soil in which crops are grown is an important factor for human health.  It isn’t just what we eat that matters; it is how we grow it.

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Farms following soil-friendly practices grow healthier food, study suggests

Photo, posted January 10, 2020, courtesy of Les via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Promoting Biodiversity In Agriculture | Earth Wise

September 13, 2021 By EarthWise Leave a Comment

The best methods to promote biodiversity in agriculture

The organic foods industry is one of the fastest growing agricultural segments in the United States.  According to the Organic Trade Association, U.S. organic sales reached $61.9 billion in 2020, a jump of more than 12% over the previous year. 

Organic food has many benefits.  Organic food is free of antibiotics, growth hormones, and GMOs, and is grown using fewer pesticides.  Organic farming tends to be better for the environment by reducing pollution, conserving water, reducing soil erosion, increasing soil fertility, and using less energy.   And it’s also better for the health of nearby wildlife as well as the people who live close to farms. 

But when it comes to promoting biodiversity in agriculture, is organic farming the only alternative to conventional agriculture? It turns out it’s not – at least according to a new study recently published in the journal Trends in Ecology and Evolution. 

According to an international research team led by the University of Göttingen in Germany, a landscape mosaic of natural habitats and small-scale and diverse cultivated areas is the key to promoting biodiversity on a large scale in both conventional and organic agriculture.

According to the research team, areas cultivated to organic standards have one third more species, but don’t reach the yield level of conventional farming.  This means that more land would need to be cultivated organically in order to produce the same amount of food.  But as larger areas are cultivated, the advantages for biodiversity would disappear.    

Landscapes with small fields, long edges, high crop diversity, and at least 20% near-natural habitats can promote biodiversity significantly more than just organic certification.   

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U.S. Organic Industry Survey 2021

Promoting biodiversity-friendly landscapes – beyond organic farming

Photo, posted August 29, 2019, courtesy of Lance Cheung/USDA via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Better Ways To Make Bioplastics | Earth Wise

August 27, 2021 By EarthWise Leave a Comment

How to replace plastic

The world produces over 300 million tons of plastics each year, mostly produced from petroleum.  The environmental consequences are substantial and there is a critical need to replace as much of that plastic production with biodegradable plastics as possible.  Thus, there is global research aimed at making bioplastics more economical and as environmentally friendly as possible.

Researchers at Texas A&M University have developed an improved approach for making bioplastics from corn stubble, grasses, and mesquite agricultural production.  Apart from the obvious environmental benefits of having biodegradable plastics, producing bioplastics from common agricultural waste would create new revenue streams for farmers as well as the people who transport harvested feedstock and byproduct crops to refinery operations.

The key to bioplastic production is the efficient extraction and use of lignin, the organic polymer that is the primary structural support material in most plants.  The new research takes five conventional pretreatment technologies for plant materials and modifies them to produce both biofuel and plastics together at a lower cost.  The new method is called “plug-in preconditioning processes of lignin” and it can be directly and economically added into current biorefineries.  The process is designed to integrate dissolving, conditioning, and fermenting lignin, extracting energy from it and making it easily adaptable to biorefinery designs.

The so-called bioeconomy currently supports some 286,000 jobs.  Innovation is the key to achieving more widespread use of biodegradable plastic.  With improved economics of so-called lignocellulosic biorefineries, there can be new avenues to use agricultural waste to produce biodegradable plastics.

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‘Plugging in’ to produce environmentally friendly bioplastics

Photo, posted November 5, 2015, courtesy of Kathryn Faith via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Europe’s Green Deal: Bad For The Planet? | Earth Wise

December 28, 2020 By EarthWise Leave a Comment

Europe's Green Deal might simply be exporting its environmental pollution

In 2019, the European Union announced the “Green Deal,” a comprehensive program aimed at making Europe the first climate-neutral continent, implementing environmentally friendly transport, increasing recycling, and expanding renewable energy.

The Green Deal involves significant changes to European agriculture.  Over the next ten years, under the ambitious environmental program, at least a quarter of all agricultural areas will be farmed organically, the use of fertilizers and pesticides greatly reduced, 3 billion trees planted, 15,000 miles of rivers restored, and the population declines of pollinators reversed.

However, in a recent article published in Nature, scientists at the Karlsruhe Institute of Technology show that this Green Deal might actually be a bad deal for the planet.

The problem is that the EU is likely to basically be outsourcing environmental damage by its high imports of agricultural products.

According to the Karlsruhe study, the EU annually imports millions of tons of agricultural products, as much as 20% of its produce and much of its meat and dairy products.  Quite often, these imports come from countries whose environmental laws are far less stringent than those in Europe.

The EU cannot impose environmental standards on other countries, but it can demand that goods entering the European market meet EU requirements.  The study points out that Europe’s carbon footprint has to be evaluated on a global basis.  If the EU is truly to become a climate-neutral continent, it must include foreign trade goals and requirements in its environmental programs.  Otherwise, Europe will simply be outsourcing its environmental problems and will continue to cause damage to the planet.

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Green Deal: Good for a Climate-neutral Europe – Bad for the Planet

Photo, posted July 17, 2009, courtesy of Edmund Garman via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

A New Problem For New York Apples | Earth Wise

August 6, 2020 By EarthWise Leave a Comment

new york apples in trouble

New York is the second largest apple-producing state in the country, trailing only Washington state.  New York averages nearly 30 million bushels of apples annually from approximately 600 commercial growers.  The apple industry supports 10,000 direct agricultural jobs as well as 7,500 indirect jobs involved with fruit handling, distribution, marketing and exporting.

Thus, there is considerable concern about the recent discovery by Cornell plant pathologists of a new fungal pathogen that causes bitter rot disease in apples.  They also found a second related fungus that is known to cause rot disease in other fruits but has now been found for the first time in apples.  The study was published in early July in the journal Scientific Reports.

Both of these pathogens belong to the genus Colletotichrum, which contains 189 species of fungi that cause devastating rot diseases in multiple fruit crops, including bananas, strawberries, citrus, avocados, papayas, mangoes and apples.

Unless protective measures are taken in a timely manner, apple losses from bitter rot in New York state can average up to 25% per year.  Some organic farms have lost essentially all of their crop at times.  Bitter rot also can destroy up to 5% of marketable fruit in post-harvest storage.

The Cornell study of samples from eight New York counties found both the Colletotrichum chrysophilum fungus, that had not been found in apples before, and a newly-discovered fungus that they named Colletotrichum noveboracense, after the Latin name for New York State.

The researchers plan to work with other plant pathologists and apple breeders to identify possible genes that confer natural resistance to Colletotrichum fungi that can be bred into apple cultivars.

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Scientists identify new pathogen in NY apples

Photo, posted October 12, 2018, courtesy of Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Strategies To Promote Green Products | Earth Wise

March 26, 2020 By EarthWise Leave a Comment

downplay greenness to consumers to sell products

Green products are environmentally-friendly products with features that are less harmful to people and the planet.  For instance, green products may require fewer resources to produce, consume less energy, contain non-toxic ingredients, or create fewer emissions.  Some examples include biodegradable waste bags, LED light bulbs, low-flow shower heads, organic cotton clothing, and reusable coffee cups and water bottles.  

But according to new research from two universities in the United Kingdom, companies looking to promote their latest environmentally-friendly product should actually downplay its greenness if they want consumers to buy it.

The study, by researchers from the University of East Anglia and the University of Leeds, found advertising that highlights a product’s green attributes can lead consumers to associate it with weak performance.  The findings, which were recently published in the Journal of Advertising, indicate that companies should downplay a product’s green qualities and instead promote it on more traditional aspects.

An example of these two distinct advertising strategies – green emphasis versus green understatement – can be found in the auto industry.  Car manufacturer Toyota prominently highlights the low emissions and low fuel consumption features of the Prius, employing what the researchers term as ‘explicit signals’.  In contrast, automaker Tesla reduces the prominence of its green attributes, focusing instead on its cars’ acceleration, handling, and other performance-related characteristics.  This is known as the ‘implicit signals’ marketing approach.

After conducting two experiments, the research team found that the implicit, rather than explicit, marketing approach about greenness leads to higher performance evaluations and purchase intent.

Consumers appear more likely to engage in pro-social actions when it’s accompanied by some form of personal benefit. 

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Highlighting product greenness may put consumers off buying

Photo, posted December 21, 2019, courtesy of Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Jet Fuel From Acetone | Earth Wise

February 25, 2020 By EarthWise Leave a Comment

Greening Jet Fuel

Acetone is a common organic solvent.  It is used to make plastic, fibers, drugs, and other chemicals.  It is commonly used by consumers as nail polish remover.  Acetone is a manufactured chemical, but it is also found naturally in the environment in plants, among other places. There are now companies that produce acetone entirely by fermentation of plant feedstocks, such as corn.

Researchers at Los Alamos National Laboratory have now developed a process by which acetone can be converted into a fuel additive that can improve the performance of petroleum-based jet fuel, providing both environmental and economic benefits.

The process takes biomass-derived acetone and converts it to isophorone, which they produce by a process called photochemical cycloaddition that creates more complex hydrocarbons.  They then use ultraviolet light to convert the isophorone into cyclobutane, which is a type of hydrocarbon with high energy density that is suitable for aviation fuel applications.

Acetone itself is quite volatile and is unsuitable for fuel applications.  It also cannot be added directly to any fuel supply since it can dissolve engine parts and o-rings.  Cyclobutane, on the other hand, is a safer and more energy-dense fuel that can be a replacement for additives that require high-pressure hydrogen treatment in their synthesis.  Currently, most hydrogen is produced by a process that generates carbon dioxide.  The new conversion process does not result in carbon emissions.

According to the Los Alamos researchers, their process can result in a domestically generated product that will provide environmental benefits, create domestic jobs, improve U.S. energy security, and further U.S. global leadership in bioenergy technologies.

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Acetone plus light creates a green jet fuel additive

Photo, posted December 18, 2007, courtesy of Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Land And Diets

September 13, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/09/EW-09-13-18-Land-and-Diets.mp3

Most of us are likely familiar with the saying ‘you are what you eat.’ But what we eat – those food choices – can have a profound impact on the planet. 

[Read more…] about Land And Diets

Myths About Organic Food

January 22, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/01/EW-01-22-18-Myths-About-Organic-Food.mp3

There is much to be said in favor of organic food.  The organic produce industry took in $65 billion in 2016 and that farming method is clearly increasingly popular and is here to stay.   Nevertheless, there are various misconceptions and inaccuracies related to organic food.

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Greening Halloween

October 30, 2017 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2017/10/EW-10-30-17-Greening-Halloween.mp3

According to the National Retail Federation, 179 million Americans are expected to spend $9.1 billion – or nearly $84 per person – on Halloween festivities this year, reaching a new record high.  But it’s not just our wallets that take a beating.  The planet also pays quite a price. 

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Help Save The Bees

December 13, 2016 By EarthWise

https://earthwiseradio.org/wp-content/uploads/2016/12/EW-12-13-16-Help-Save-the-Bees.mp3

Globally, 40% of invertebrate pollinator species, such as bees and butterflies, are facing extinction.  And since approximately three-quarters of the world’s food crops depend on pollination, the decline of these pollinators could pose a threat to food security around the globe. 

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Big Changes To Big Poultry

July 19, 2016 By WAMC WEB

https://earthwiseradio.org/wp-content/uploads/2016/07/EW-07-19-16-Big-Changes-to-Big-Poultry.mp3

Perdue Farms, the fourth-largest poultry producer in the United States, produces over 60 million pounds of chicken a week.  They are arguably the most progressive of the giant poultry companies.  Two years ago, they were the first to renounce routine antibiotic use.   In late June, they announced a comprehensive animal-welfare plan – the first among large producers – that will change how its chickens are bred, raised and killed.

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Organic Food Is Increasingly Affordable

July 8, 2016 By WAMC WEB

https://earthwiseradio.org/wp-content/uploads/2016/06/EW-07-08-16-Organic-Food-Increasingly-Affordable.mp3

Organic food is increasingly popular.  Food chains like Sprouts and Whole Foods as well as local food coops and health food stores have led the charge.  More recently, major supermarket chains have growing organic departments in their stores.  In fact, in 2015, sales of organic foods in the U.S. reached $43 billion, an increase of 11% over just the the previous year. 

[Read more…] about Organic Food Is Increasingly Affordable

Ugly Produce

April 4, 2016 By WAMC WEB

https://earthwiseradio.org/wp-content/uploads/2016/03/EW-04-04-16-Ugly-Produce.mp3

Estimates are that as much as 40% of produce in America is wasted.  We throw out fruits and vegetables for a variety of reasons, but one of the most unfortunate is when produce is tossed simply because it doesn’t look good enough.   Misshapen tomatoes, lumpy carrots, double-lobed potatoes, and crooked cucumbers end up in the waste bin instead of on our plates.

[Read more…] about Ugly Produce

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