supplies

South American drought

November 13, 2024 By EarthWise Leave a Comment

Vast areas of South America have been gripped in drought conditions for months. Rivers in the Amazon basin fell to record-low levels in October. The drought has amplified wildfires, parched crops, disrupted transportation networks, and interrupted hydroelectric power generation in parts of Brazil, Bolivia, Colombia, Ecuador, Peru, and Venezuela.

The drought is related to the impact of the El Niño that was present for the latter part of 2023 and the first half of this year. El Niño typically shifts rainfall patterns in such a way that there is reduced rainfall in the Amazon. This is especially true during the dry season months of July, August, and September.

Forecasts earlier in the year warned that there would be extreme fire conditions during the dry season. Indeed, the Pantanal region that spans parts of southern Brazil, Paraguay, and Bolivia has experienced one of its worst fire seasons in decades. The lack of rainfall, low soil moisture, and drawdowns of groundwater helped to amplify fires and caused them to spread faster and farther.

The drought has strained power supplies in Brazil and Ecuador because hydroelectric power stations are producing less electricity. Snarled transportation networks with impassible rivers have left some communities struggling to get supplies.

Brazil’s National Center for Monitoring and Early Warning of Natural Disasters has called the current drought the most intense and widespread Brazil has ever experienced. Late October saw 293 Brazilian municipalities facing extreme drought.

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Intense, Widespread Drought Grips South America

Photo, posted August 13, 2010, courtesy of Colm Britton via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Greenhouses and the environment

July 25, 2024 By EarthWise Leave a Comment

The use of greenhouses around the world has been growing dramatically. A new satellite mapping exercise estimated the total land area covered with permanent greenhouses at 3.2 million acres, which is an area the size of Connecticut. More than half of this is in China, where the growth of greenhouses has been driven by the rapid urbanization of the country and by a more prosperous population increasingly consuming produce like tomatoes, cucumbers, peppers, and eggplants.

The intensive agricultural methods employed within greenhouses can be harmful to local environments because of overtaxing water supplies and by polluting rivers and soils with nutrients, pesticides, and plastic waste. But the effects of vast areas of plastic coverings on local temperatures can be even more dramatic, and often beneficial.

There are so many plastic and glass roofs in many areas that they are reflecting sufficient amounts of solar radiation to cool local temperatures. Greenhouse roofs increase the albedo – the reflectivity – of the land surface typically by a tenth.

All these greenhouses are just the tip of the albedo iceberg. Many farms now temporarily cover crops with reflective plastic sheets. If these coverings are included in the satellite survey, the total reflective area would be about ten times greater – roughly the size of New York State.

A study in Almeria, on the Mediterranean coast of Spain, which grows about 3 million tons of fruit and vegetables annually, determined the cooling effects of greenhouses. Weather stations amid the greenhouses showed an average cooling of 1.3 degrees Fahrenheit compared with the surrounding area.

Greenhouses are an accidental and benign form of climate engineering. The cooling provided by greenhouses is similar to the effect of white roofs in urban areas.

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Could the Global Boom in Greenhouses Help Cool the Planet?

Photo, posted September 6, 2017, courtesy of Lance Cheung / USDA 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

Solar Power And Water | Earth Wise

August 8, 2023 By EarthWise Leave a Comment

Solar power is a prime example of clean energy, but it does not come without complications and potential problems. One problem that has arisen in the Californian desert is the effect on scarce water supplies. Solar farms don’t use up water when they are operating but they consume it when they are being built.

One of the densest areas of solar development in North America is in a corridor along Interstate 10 near Palm Springs, California. Multiple utility-scale solar projects are underway near the small town of Desert Center. The projects are being built on public land overseen by the Department of Interior’s Bureau of Land Management. The location is ideal for solar power projects: endless sunshine, nearby transmission lines to distribute power, and a major highway for easy transportation of construction materials.

The problem is that during construction of the solar farms, the law requires developers to reduce the amount of dust being generated that can otherwise spread health problems like Valley Fever. Preventing dust from flying requires water and lots of it.

The water comes from groundwater and building the solar farms is drying up local wells and emptying the aquifer that is part of the Chuckwalla Valley Groundwater Basin. For the people who live in Desert Center and adjacent areas, this is a serious problem. It is also a problem for the desert ecosystem that supports palo verde and ironwood trees as well as endangered desert tortoises.

This isn’t an easy problem to solve. Seven approved new utility-scale solar projects in the area will provide enough electricity to power 2 million homes. But having enough water to build those projects won’t be easy.

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Solar Is Booming in the California Desert, if Water Issues Don’t Get in the Way

Photo, posted October 16, 2017, courtesy of UC Davis College of Engineering 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

Tepary Beans | Earth Wise

September 2, 2022 By EarthWise Leave a Comment

Tepary beans are an ancient crop native to the northern part of Mexico and the southwestern part of the U.S.. They have been grown in those places by native peoples since pre-Columbian times. They are still grown in Native American reservations in Arizona’s Sonoran Desert. One can purchase them from some small farms in that region.

What sets tepary beans apart from other beans is that they are among the most drought- and heat-tolerant legume crops in the world. They can be grown without irrigation under conditions that are not viable for other crops. They can be consumed by people like many other kinds of beans, and they can also provide forage for livestock with better nutrition content than many other plants. They seem to be a very attractive option for a crop in the changing climate. What is lacking, at present, is large supplies of tepary seeds to be planted.

Researchers at Texas A&M have been funded to bring tepary beans into modern cropping systems and diets. The goal is to develop tepary bean cultivars with high biomass and yield that are still well-suited to drought and heat conditions. Getting the beans to the point of widespread commercialization will take several years. The end result should be of interest to pulse growers, seed industries, and food companies across the U.S.

Tepary beans are higher in fiber and protein than most other beans. They come in several different colors, each of which has unique flavor and texture characteristics. The white ones have a naturally sweet flavor. The brown beans are slightly nutty in flavor and are similar to pinto beans. If the Texas program is successful, we may all be eating tepary beans some day.

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Tepary Beans Offer Producers A Low-Input, Climate-Resilient Legume Alternative

Photo, posted August 25, 2017, courtesy of Katja Schulz via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Electric Cars On The Rise | Earth Wise

May 16, 2022 By EarthWise Leave a Comment

The first quarter of the year was a tough one for the U.S. auto industry. Overall sales of cars and trucks were down 15.7% compared with last year. Automakers have been dealing with shortages of computer chips and other supplies, resulting in slowdowns in production.

The one major exception to the trend has been sales of electric cars. In the first quarter, U.S. electric vehicle sales were up 76% compared with last year. This was enough to double EV’s market share to 5.2%, up from 2.5% last year.

Reaching a five percent market share is a significant indicator that electric vehicles are becoming mainstream. According to many industry analysts, this is just the beginning of a major ramp-up in EV sales.

The strong results in the first quarter were largely driven by one company – namely, Tesla. Tesla has been expanding rapidly and has been proactive and creative in avoiding delays due to parts shortages. Tesla’s best-selling car is now the Model Y, which is an SUV implementation of its Model 3 design. Overall, the company is now producing cars at a rate of more than 1 million per year and has recently opened new manufacturing plants in Texas and in Germany.

But Tesla is not the only story in the world of electric vehicles. Mass production is beginning for Ford’s F-150 Lightning truck.

Nissan, Hyundai and Kia have electric cars on the market and shortly near-twin electric models jointly developed by Subaru and Toyota will be available as well.

The electrification of vehicles is an essential step in reducing greenhouse gas emissions. With gasoline at painfully high prices, electric cars are more attractive than ever.

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Inside Clean Energy: US Electric Vehicle Sales Soared in First Quarter, while Overall Auto Sales Slid

Photo, posted October 13, 2017, courtesy of Rob Bertholf via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Corn Ethanol And The Climate | Earth Wise

March 29, 2022 By EarthWise 1 Comment

The Renewable Fuel Standard legislation, first passed in 2005 and updated in 2007, requires billions of gallons of renewable fuel to be added to the country’s transportation fuel supplies. It created the world’s largest biofuels program.

The standard was hailed as a major victory for the climate as well as a way to reduce our dependence upon foreign oil.

The intent of the legislation was to encourage various forms of renewable fuels – especially cellulosic ethanol from plant and wood fiber – to become an increasing part of the fuel mix. That has yet to happen. Instead, corn ethanol has been the backbone of the program.

Back in 2007, the EPA determined that ethanol from corn would lead to a 20% reduction in greenhouse gases compared to gasoline. But the next year, a study published in the journal Nature projected that corn ethanol would double greenhouse gas emissions over 30 years because demand for corn would drive farmers to plow up increasing amounts of carbon-rich forest and grassland.

A new study published by researchers at the University of Wisconsin, Madison, has again concluded that corn-based ethanol may actually be worse for the climate than fossil-based gasoline as well as having other environmental downsides. According to the study, since the fuel standard was passed, farmers have expanded corn production on nearly 7 million acres each year, causing the conversion of lands to cropland. The result is that the carbon intensity of corn ethanol could be as much as 24% higher than gasoline.

The issue is still being debated in Congress, but if these results are verified, the time has come to revamp the terms of the renewable fuel standard.

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Corn-Based Ethanol May Be Worse For the Climate Than Gasoline, a New Study Finds

Trots den höga effektiviteten leder inte vissa patienter som tar läkemedlet till en förbättring av erektion. Detta beror på felaktig användning av medicinen eller på att ED helt enkelt är en följd online apotek viagra av en annan sjukdom. I sådana fall är det obligatoriskt att konsultera och undersöka en läkare.

Photo, posted October 23, 2011, courtesy of the United Soybean Board via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

A Big Year For European Solar Power | Earth Wise

February 2, 2022 By EarthWise Leave a Comment

The installed solar capacity in the European Union grew by 34% in 2021. This means that Europe is on pace to quadruple its solar energy generation by 2030.

During 2021, the 27 countries of the European Union installed 25.9 gigawatts of new solar capacity, compared with 19.3 gigawatts in 2020. This was the biggest year yet for solar growth, beating out the previous record of 21.4 gigawatts set in 2011. A gigawatt of solar electricity is enough to power about 300,000 homes, so the 2021 installations can produce enough electricity for about 8 million households. The European Union is home to about 450 million people.

SolarPower Europe, an industry trade organization, projects that solar energy capacity in the EU will increase from the current 165 gigawatts to 328 gigawatts in 2025 and as much as 672 gigawatts by 2030.

The EU has the goal of generating 45% of its electricity from renewable sources by 2030, which is an important milestone in achieving climate neutrality by 2050.

Challenges still facing the EU include obstacles to permitting, electricity grid bottlenecks, and assurance of solar panel supplies. Much of Europe’s supply of solar panels comes from China. The EU wants to boost its own production of solar panels to 20 gigawatts per year by 2025.

The US currently has about 113 GW of installed solar capacity and is projected to install about 300 gigawatts of new capacity over the next 10 years.

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For the European Union, 2021 Was a Banner Year for Solar Power

Photo, posted May 3, 2007, courtesy of Bernd Sieker via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Metals In Western Water Supplies | Earth Wise

October 29, 2021 By EarthWise Leave a Comment

A new study published by the University of Colorado Boulder looked at the problem of rivers being contaminated by acid rock drainage. Rocks that include sulfide-based minerals, such as pyrite, oxidize when exposed to air and water. The resulting chemical reaction produces sulfuric acid which, when present in water, dissolves metals like lead, cadmium, and zinc. The recent study found that rare earth elements are also leached out of rock by this process.

Rock drainage occurs naturally throughout the western United States, but historic mines that disturbed large amounts of rocks and soil have dramatically increased this process and have led to growing downstream water pollution. Upwards of forty percent of the headwaters of major rivers in the West are contaminated by some form of acid mine or rock drainage.

The warming climate has brought longer summers and less snow in winters. Longer, lower stream flows make it easier for metals to leach into watersheds and concentrate the metals that would otherwise be diluted by snowmelt.

Rare earth elements are essential components of many high-tech devices such as computers, hard drives, and cell phones. There is not a long history of studying the hazards they might represent when they enter the environment.

The study looked at the Snake River watershed in Colorado and found that increasing amounts of rare earth elements are entering Colorado water supplies. Concentrations of rare earth elements are not ordinarily monitored and there are no water quality standards set for them.

According to the researchers, once rare earth elements get into water, they tend to stay there. Traditional treatment processes don’t remove them. It is a growing problem that needs to be addressed.

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Rare earth elements and old mines spell trouble for Western water supplies

Photo, posted October 27, 2007, courtesy of Dion Gillard via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Minerals And Metals For A Low-Carbon Future | Earth Wise

February 14, 2020 By EarthWise Leave a Comment

For the past century, economies and geopolitics have largely been driven by our insatiable appetite for oil and fossil fuels in general. As we gradually make the transition to a low-carbon energy future, the focus on oil will shift to sustainable supplies of essential minerals and elements.

The use of solar panels, batteries, electric vehicle motors, wind turbines, and fuel cells is growing rapidly around the world. These technologies make use of cobalt, copper, lithium, cadmium, and various rare earth elements. The need for any one of these things may diminish if alternatives are found, but there will continue to be a growing reliance on multiple substances whose physical and chemical properties are essential to the function of modern devices and technologies.

In some cases, global supplies of particular minerals and elements are dominated by a particular country, are facing social and environmental conflicts, or face other market issues. Shortages of any of them could create economic problems and derail progress much as the oil-related energy crises of the past have.

The world faces challenges in managing the demand for low-carbon technology minerals as well as limiting the environmental and public health damage that might be associated with their extraction and processing. Expanded use of recycling and reuse of rare minerals will be essential.

As the relatively easy sources of these materials become exhausted, other resources will become more attractive. These include various valuable ecosystems, oceanic deposits, and even space-based reserves.

Ushering in the low-carbon future is not a simple matter and will require responsible actions by the world’s governments and industries. In undoing the damage from the oil age, we must avoid new damage from the low-carbon age.

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Sustainable supply of minerals and metals key to a low-carbon energy future

Photo, posted March 13, 2015, courtesy of Joyce Cory via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Solar Plus Storage In The Caribbean

November 22, 2018 By EarthWise Leave a Comment

The Caribbean is home to nearly 30 island nations and more than 7,000 individual islands with a combined population of around 40 million. All of the islands are susceptible to disasters such as hurricanes that can leave residents without electrical power for extended periods of time.