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Waste

Car Parts From Agricultural Waste

January 11, 2019 By EarthWise Leave a Comment

A new bio-composite material made from date palm fiber biomass could be used to produce sustainable, lightweight and low-cost parts for the automobile and marine industries.

A team of researchers from the UK has developed a date palm fiber polycaprolactone composite that is completely biodegradable, renewable,sustainable and recyclable, in contrast to synthetic composite materials reinforced by glass and carbon fibers. The team tested the mechanical properties of the material and found that it achieved better low-velocity impact resistance than traditional man-made composites.

The idea would be to use the material in non-structural auto parts such as car bumpers and door linings.   The result would be to reduce the weight of vehicles, contributing to less fuel consumption and lower emissions.  The new material can be produced using less energy than glass and carbon fibers and is biodegradable and therefore easier to recycle.

Date palm fibers are one of the most available natural fibers in many parts of the world.  The trees produce a large quantity of agricultural waste, which is mostly burned or land-filled,causing serious environmental problems.

Convincing industry to use a new class of materials such as natural-fiber reinforced composites is challenging.  First it is necessary to obtain consistent,reliable properties from the material. Then the industries need to work closely with the developers to test the materials and convince themselves of the viability of using them.  The team, led by researchers at the University of Portsmouth, has been working with industry to test the viability of parts made from a variety of other sustainable materials as well including flax, hemp, and jute.  Someday, our cars may have bumpers made from agricultural waste.

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Agricultural waste drives us closer to greener transport

Photo, posted October 27, 2017, courtesy of David Stanley via Flickr. 

Earth Wise is a production of WAMC Northeast Public Radio.

Can We Remove Enough CO2 From The Air?

January 9, 2019 By EarthWise Leave a Comment

As atmospheric carbon dioxide levels continue to set new records and the effects of climate change grow stronger, humanity has continued to procrastinate on reducing emissions.  As a result, it is increasingly clear that any strategy to avoid runaway climate change will have to involve the use of “negative emissions”- techniques or technologies that actually remove CO2 from the air.

There are both low-tech and high-tech methods for removing carbon dioxide from the atmosphere and both are likely to be needed. 

On the low-tech side, afforestation (planting trees where there were none before), reforestation, changes in forest management, rebuilding the carbon backbone in agricultural soils, and the use of energy from waste biomass are all ways to take carbon out of the atmosphere.

On the high-tech side, direct air capture technologies that take CO2 out of the air and store it in the ground are making rapid progress.   Right now, they are still very expensive,but that is changing.  There is an analogy to wind and solar technology. Not very long ago, both of those technologies were quite expensive but now their costs have plummeted to the point where they are often the cheapest way to make electricity.  With sufficient development effort and deployment, direct air capture technology could become quite affordable.

Some people advocate geoengineering as a solution for climate change.  While removing carbon dioxide amounts to tackling the root cause of the warming climate,geoengineering would address the problem by changing the climate again in some other way.  It is at best an extremely dangerous approach.

Removing CO2 using a combination of natural and man-made techniques is an important part of mitigating the effects of climate change.

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Climate Solutions: Is It Feasible to Remove Enough CO2 from the Air?

Photo courtesy of Climeworks. 

Earth Wise is a production of WAMC Northeast Public Radio.

A Supermaterial From Plastic Waste

December 13, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/12/EW-12-13-18-A-Supermaterial-From-Plastic-Waste.mp3

Researchers at the National University of Singapore have created a way to convert plastic bottle waste into an ultralight aerogel material that has multiple potential applications.

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Plastic Bottles

November 19, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/10/11-19-18-Plastic-Bottles.mp3

Plastic straws have become outcasts these days and for good reasons.  But they are not the only bad actors in the world of plastic products.  Single-use plastic water bottles are another example of a real trouble maker.

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Turning Plastic Waste Into Green Energy

November 14, 2018 By EarthWise 1 Comment

https://earthwiseradio.org/wp-content/uploads/2018/11/EW-11-14-18-Turning-Plastic-Waste-into-Green-Energy.mp3

In the Back to the Future movies, the DeLorean time machine ran on garbage.  We aren’t any closer to building time machines, but it might soon be practical to produce fuel from garbage.

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Legos And Plastics

October 23, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/10/EW-10-23-18-Legos-and-Plastics.mp3

Globally, consumers are voicing concerns about the impact of plastic waste on the planet. Conscious of these consumer concerns, many companies are trying to switch to recyclable or less-polluting packaging.  Some are even ditching plastics all together. 

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The Earliest Overshoot Day Ever

October 11, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/09/EW-10-11-18-The-Earliest-Overshoot-Day-Ever.mp3

Earth Overshoot Day marks the date when humankind’s demand for ecological resources and services in a given year exceeds what our planet can regenerate in that year.  The deficit for the remainder of the year means we are liquidating stocks of ecological resources and accumulating waste, primarily carbon dioxide in the atmosphere.

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Reducing Food Waste

October 9, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/09/EW-10-09-18-Reducing-Food-Waste.mp3

Food waste is a huge problem.  About a third of all food produced globally goes to waste, and the numbers are even worse in the US.  If food waste was a country, it would be the world’s third largest emitter of greenhouse gases.  Worse yet, all of this takes place in a world where 850 million people are chronically undernourished.

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Better Sell-By Dates For Milk

October 2, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/10/EW-10-02-18-Better-Sell-By-Dates.mp3

The sell-by and best-by dates on milk cartons are ones we tend to pay close attention to.  Many of us automatically discard milk if it is past one of those dates.  However, those dates are not really scientifically established but rather are guesses based on experience.

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Designing Plastic To Fall Apart

September 17, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/09/EW-09-17-18-Designing-Plastic-to-Fall-Apart.mp3

In the 1940s and 1950s, synthetic polymers became very popular.  These man-made materials were designed to be cheap and durable and soon began replacing metals and glass in everything from automobiles and airplanes to bottles and dishes.

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Hippo Waste And Fish

September 10, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/08/EW-09-10-18-Hippo-Pools.mp3

Agricultural and sewage pollution can cause low-oxygen conditions and fish kills in rivers. A new study published in Nature Communications reports that hippo waste can have a similar effect in Africa’s Mara River, which passes through the world renowned Maasai Mara National Reserve of Kenya and is home to more than 4,000 hippos.

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Global Warming And Air Conditioners

August 24, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/08/EW-08-24-18-Global-Warming-and-Air-Conditioners.mp3

All those record high temperatures around the world this summer – such as during the unprecedented heatwave in Japan – put the spotlight on the growing dependence we all have on air conditioning. 

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Greener Concrete

August 23, 2018 By EarthWise 1 Comment

https://earthwiseradio.org/wp-content/uploads/2018/07/EW-08-23-18-Greener-Concrete.mp3

The battle to reduce carbon emissions is heavily focused on electricity generation, transportation, buildings, and agriculture, which collectively account for more than 75% of the total.  However, there are other sources of carbon emissions that cannot be ignored.  Among industrial activities, the production of cement is responsible for 7% of industrial energy use and is the second largest industrial emitter of carbon dioxide.  Making cement accounts for about 7% of global emissions.

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Cleaning Up Shipping Fuel

August 21, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/08/EW-08-21-18-Cleaning-Up-Shipping-Fuel.mp3

Cargo ships are significant sources of global air pollution because of their fuel oil.  Most ships burn something called “bunker fuel” which is a pitch-black, molasses-thick fuel made from the dregs of the oil refining process.  It is loaded with sulfur, so when it is burned it produces noxious gases and fine particles that can harm human health and the environment.  Because bunker fuel is made from petroleum refining residues, waste byproducts sometimes end up in the mix, making the stuff even a worse source of pollution.

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Progress On Plastic Straws

August 10, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/08/EW-08-10-18-Progress-on-Plastic-Straws.mp3

Earlier this year we talked about the contributions of plastic straws to the global problem of plastic waste.  Americans throw away an astounding 500 million straws a day.  But global campaigns to reduce the use of plastic straws are starting to make real headway.

[Read more…] about Progress On Plastic Straws

Better Ways To Fish

July 4, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/07/EW-07-04-18-Better-Ways-to-Fish.mp3

A recent study published in Fisheries Research looked at the effectiveness and level of waste for various categories of fishing gear used in the global fishing industry.

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Infinitely Recyclable Plastic

June 8, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/06/EW-06-08-18-Infinitely-Recyclable-Plastic.mp3

Less than 10% of discarded plastic is recycled.  This is one of the major reasons that plastic waste is such a threat to the environment.  There are many challenges to recycling plastics.  For one thing, there are many different types of plastic and if they are melted together, they tend to phase-separate like oil and water and the resultant substance is structurally weak.  Sorting plastics by type is not a simple task.   More generally, it is very difficult to produce plastic with its original properties from recycled feedstock.  So recycled plastics generally end up being useful in only more limited applications.

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An Accidental Plastic Eater

May 29, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/05/EW-05-29-18-An-Accidental-Plastic-Eater.mp3

A couple of years ago, scientists in Japan discovered bacteria at a recycling plant that were breaking down a type of plastic called polyethylene terephthalate, or PET.  With the world facing a growing plastic pollution problem, British and American researchers began to study the enzyme that the bacteria were using to try to understand how it works.

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A Bad Food Patch

May 14, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/04/EW-05-14-18-A-Bad-Food-Patch.mp3

A group of scientists and engineers at McMaster University in Hamilton, Ontario, has developed a new technology that could replace traditional “best before” dates on food and beverages with a definitive indication of the safety of the product.

[Read more…] about A Bad Food Patch

Nitrogen Pollution

March 30, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/03/EW-03-30-18-Nitrogen-Pollution.mp3

Earth system scientists say that there are four major human-caused forces that threaten to cause irreversible and abrupt environmental upheaval:  climate change, deforestation, biodiversity loss, and excess nitrogen.

[Read more…] about Nitrogen Pollution

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