GHGs

Deforestation-Free Pledges | Earth Wise

December 12, 2022 By EarthWise Leave a Comment

Deforestation is the purposeful clearing of forested land. Forests are cut down to make space for animal grazing, agriculture, and to obtain wood for fuel, manufacturing, and construction. Deforestation has greatly altered landscapes around the world and continues to do so today.

Deforestation is the second largest contributor to global greenhouse gas emissions, trailing only fossil fuel use. Deforestation can lead to all sorts of problems, including biodiversity loss, soil erosion, desertification, and flooding. Deforestation also threatens peoples’ livelihoods and increases inequality and conflict.

As a result, many companies around the world have made pledges to remove deforestation from their supply chains. In fact, more than 94 companies had adopted zero-deforestation commitments by 2021. But while these companies are talking the talk, they don’t seem to be walking the walk.

According to a new study recently published in the journal Environmental Research Letters, companies’ deforestation-free supply chain pledges have barely impacted forest clearance in the Amazon.

The research team from the University of Cambridge, Boston University, ETH Zurich, and New York University found corporate pledges to not purchase soybeans grown on land deforested after 2006 have only reduced tree clearance in the Brazilian Amazon by 1.6% between 2006 and 2015. The researchers found that if these pledges had been implemented, the current levels of deforestation in Brazil could be reduced by approximately 40%.

According to the research team, the findings of the study indicate that private sector efforts are not enough to stop deforestation. Political leadership will also be vital to forest conservation efforts.

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Companies’ ‘deforestation-free’ supply chain pledges have barely impacted forest clearance in the Amazon, researchers say

Photo, posted November 18, 2020, courtesy of Ivan Radic via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Fuel From Coffee Grounds | Earth Wise

December 8, 2022 By EarthWise Leave a Comment

The world drinks a lot of coffee. Americans alone consume 400 million cups a day. Each cup of coffee results in about half an ounce of coffee grounds. Adding that up, this country produces over 6,000 tons of coffee grounds each day. While coffee grounds are not particularly harmful, that is an awful lot of waste that mostly ends up in landfills or is incinerated.

Researchers at Aston University in the UK have developed a method of producing high-quality biodiesel fuel from coffee grounds. Their study was published in the journal Renewable and Sustainable Energy Reviews.

The technique consists of growing a particular species of microalgae (Chlorella vulgaris) directly on spent coffee grounds. The coffee grounds provide both the nutrients for the microalgae and a structure upon which it can grow. Exposing the algae to light for 20 hours a day and dark for just four hours a day produced the best quality biodiesel.

Microalgae is well-known as a feedstock for biodiesel production. Previously, it has been grown on materials like polyurethane foam or nylon which don’t provide any nutrients. Using the coffee grounds as the substrate for growth means that no external nutrients are needed.

The resultant enhanced biodiesel produces minimal emissions and good engine performance and meets both US and European specifications. This feedstock for producing biodiesel is ideal since it doesn’t require any competition with food crops and instead makes use of a widely available waste product. The hope is that it may reduce the cutting down of palm trees to extract oil for biofuel. In southeast Asia, this has been a major source of deforestation and increased greenhouse gas emissions.

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Aston University researchers ‘feed’ leftover coffee grounds to microalgae to produce low emission biodiesel

Photo, posted October 13, 2007, courtesy of David Joyce via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Renewable Energy Booming in India | Earth Wise

December 6, 2022 By EarthWise Leave a Comment

India is the country with the second largest population in the world – over 1.4 billion people – second only to China – and will undoubtedly pass China soon based on population trends in the two countries. India is the third largest emitter of carbon dioxide, after China and the U.S. With its rapidly growing population and an economy heavily dependent on coal and oil, emissions in India are on a steep upward trajectory. Currently, fossil fuels account for about 60% of India’s installed energy capacity. It is essential that actions are taken to curb its rapid increase in greenhouse gas emissions.

To that end, India’s renewables sector is booming. The country is projected to add 35 to 40 gigawatts of renewable energy each year until 2030. That’s enough energy to power up 30 million more homes each year. The country has established a target of producing 50% of its electricity from non-fossil fuel sources by the end of this decade.

India is expected to reach over 400 gigawatts of renewable energy capacity by 2030

according to the Institute for Energy Economics and Financial Analysis and Climate Energy Finance. The Indian government’s own projections estimate that the country will reach 500 gigawatts of renewable capacity in that timeframe.

As is the case with China, a country with an enormous population undergoing major economic growth and modernization has vast energy needs. While it is imperative for the entire world that India puts a cap on its growing greenhouse gas emissions, it is a difficult challenge for an energy-hungry country.

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Renewable energy booms in India

Photo, posted November 14, 2011, courtesy of Amaury Laporte via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Food Waste And The Environment | Earth Wise

November 25, 2022 By EarthWise Leave a Comment

It is tragic that 31% of the world’s food production goes uneaten. About 14% isn’t distributed after it is harvested. Another 17% ends up wasted in retail or by consumers. Worldwide, the amount of food that is wasted is enough to feed more than a billion people while at least 828 million people continue to be affected by hunger. To make matters worse, food waste accounts for 8 to 10% of global greenhouse gas emissions, which is at least double that of aviation. Food waste, rotting away in landfills, produces methane gas, a major source of global warming.

Around the world, there are efforts being launched to try to improve the situation. California now has a law that requires grocery stores to donate edible food that would otherwise be disposed of or they face fines. The state’s cities and counties are required to reduce the amount of organic waste going into landfills by 75% by 2025 and compost it instead.

In London, grocers no longer put date labels on fruits and vegetables because the labels were leading people to trash perfectly good food. France now requires supermarkets and large caterers to donate food that is still safe to eat.

South Korea has little space for landfills. So, the country has been campaigning against throwing away food for 20 years. Nearly all organic waste in the country is turned into animal feed, compost, or biogas. Koreans even have to pay for throwing out food waste. There are now trash bins equipped with electronic sensors that weigh food waste.

All of these things can help. There is no single magic bullet for reducing food waste, but it is essential to do for so many reasons.

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Inside the Global Effort to Keep Perfectly Good Food Out of the Dump

Photo, posted November 30, 2020, courtesy of Marco Verch via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Climate Promises | Earth Wise

November 23, 2022 By EarthWise Leave a Comment

The United Nations climate change conference that recently took place in Egypt is an annual event. Last year, the conference was in Glasgow, Scotland, and the participants – heads of state and business leaders – produced a long list of promises aimed at fighting global warming. How have the countries and companies making those promises done so far? Unfortunately, not very well.

Participants made pledges for progress in several major areas.

Countries promised to cut greenhouse gas emissions faster, but only 24 countries out of the 140 participants have actually done so.

Countries agreed to expedite the deployment of clean energy and the phasing out of government subsidies for fossil fuels. There has been considerable progress on green power, but coal use actually reached record highs this year primarily because of Russia’s invasion of Ukraine, which caused natural gas prices to spike.

Countries pledged $100 billion a year to help poorer countries shift to cleaner energy sources. There has been lots of effort in this area, but the target has not been met and it isn’t clear that all the money is going where it is supposed to.

More than 100 countries pledged to slash methane emissions, but most nations are only getting started.

More than 130 countries pledged to halt and reverse deforestation by 2030. Deforestation is slowly declining, but not fast enough to meet the goals of the pledge.

An important goal for this year’s climate conference was to try to find a way to not just set admirable and valuable climate goals, but to actually accomplish them. It isn’t easy, but it is essential.

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Countries Made Bold Climate Promises Last Year. How Are They Doing?

Photo, posted July 25, 2009, courtesy of Wagner T. Cassimiro via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Carbon Inequality | Earth Wise

November 4, 2022 By EarthWise Leave a Comment

Everyone contributes to climate change through the generation of greenhouse gas emissions, but individual contributions vary greatly. A study at the Paris School of Economics has determined that just 1 percent of the population is responsible for nearly a quarter of global carbon emissions growth since 1990.

The study estimated emissions from individuals’ consumption and their financial investments, and also from government spending in their country. Individuals are responsible for carbon emissions as a result of their own activities, but they also bear their share of responsibility for the emissions of the firms that they own or invest in.

In 2019, people living in sub-Saharan Africa produced an average of 1.8 tons of CO₂ equivalent per capita. In North America, the average per capita was more than 10 times higher. Meanwhile, the top 10% of North America’s emitters produced more than 75 tons each.

From 1990 to 2019, the bottom 50% of emitters was responsible for just 16% of emissions growth, while the top 1% was responsible for 23%. The top 0.1% saw emissions growth of 80%.

The inequality between rich and poor is driven more by inequality within countries than by inequality between countries. This is particularly true for wealthy countries. For example, over the study period, the top 1% saw their emissions grow by 26% while emissions actually declined 5-15% among low and middle earners even in wealthy nations.

Economic inequality drives a lot of the dynamics taking place within many countries around the world, and this even applies to pollution and greenhouse gas emissions.

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Global carbon inequality over 1990–2019

Photo, posted December 11, 2017, courtesy of Bernal Saborio via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Plant-Based Foods And CO2 Emissions | Earth Wise

September 9, 2022 By EarthWise Leave a Comment

We often hear how eating locally-sourced food is a way to minimize the carbon footprint of our diet. But from a climate impact perspective, this only has a significant impact if transportation is responsible for a large portion of a food’s final carbon footprint. In many cases, the greenhouse gas emissions related to transportation make up only a small portion of the total emissions from food, and what we eat is far more important.

In general, beef and lamb have the biggest climate footprint per gram of protein. Plant-based foods tend to have the smallest impact. Pork and chicken are somewhere in the middle.

According to new research, U.S. food production could reduce its agricultural carbon footprint between 2.5% and 13.5% by embracing plant-based alternatives to beef. The study, from researchers at Cornell University, Johns Hopkins University, and international partners, found that most of the reduction would be achieved by decreasing the number of cows needed for beef production by two to twelve million animals. The research was recently published in the journal Lancet Planetary Health.

However, the researchers also found that acting to reduce climate change in this manner could have unintended consequences. For example, economic models from the research team show that the growth in popularity of plant-based beef could disrupt the agricultural workforce, threatening more than 1.5 million jobs.

But in the big picture, doing nothing will cost much more than doing something to slow climate change. Shifting diets away from meat and other animal products and towards more plant-based foods will help shrink carbon footprints and mitigate climate change. It’s a win-win for the planet and for human health.

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Plant-based ‘beef’ reduces CO2 but threatens ag jobs

Photo, posted November 27, 2018, courtesy of Sarah Stierch via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Saving Lives With Air Conditioning | Earth Wise

August 26, 2022 By EarthWise Leave a Comment

This summer, extreme heatwaves struck the United States, Europe, and Africa. Thousands of people died as a result. In July, the impact of extreme heat in places ill-prepared for it was evident. In the U.K., where air conditioning is uncommon, public transportation shut down, schools and offices closed, and hospitals cancelled non-emergency procedures.

Air conditioning, which we mostly take for granted in this country, is a life-saving tool during extreme heat waves. However, only about 8% of the 2.8 billion people living in the hottest – and often poorest – parts of the world have AC in their homes.

A new study at Harvard modeled the future demand for air conditioning as the number of days with extreme heat continues to increase across the globe. The researchers identified a massive gap between current AC capacity and what will be needed by 2050 to save lives, particularly in low-income and developing countries.

If the rate of greenhouse gas emissions continues on its present course, the study concluded that that at least 70% of the population in several countries will require air conditioning by 2050. The number will be even higher in equatorial countries like India and Indonesia. At this point, even if the goals of the Paris Climate Accords are met, an average of 40-50% of the population in many of the world’s warmest countries will still require AC.

The research looked at various scenarios. One in which emissions continue to increase leads to widespread need for air conditioning even in temperate countries. In Germany, 92% of the population would need it, and here in the U.S., 96% would need it.

Planning for future power systems must take into account the essential needs of a warming world.

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In a hotter world, air conditioning isn’t a luxury, it’s a lifesaver

Photo, posted July 24, 2021, courtesy of Phyxter Home Services via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Reshaping Our Planet | Earth Wise

July 12, 2022 By EarthWise Leave a Comment

Human activity – especially agriculture – has altered 70% of the land on our planet. According to a new report from the United Nations, damage to the Earth’s lands has put the planet on “crisis footing”.

Our health, our economy, and our well-being depend on land. The food we eat, the water we drink, and the air we breathe all rely on status of the land to at least some extent.

According to the report, up to 40% of the planet’s land is already degraded, affecting half of the people alive today. At current rates, an additional area nearly the size of South America will be degraded by 2050.

Degradation of land occurs in various ways, including deforestation, desertification, and the loss of wetlands or grasslands. All of these things are caused by human activities. As forests, savannas, wetlands, and mangrove swamps are converted to agriculture or are lost to urban expansion, greenhouse gas emissions rapidly increase, adding to the effects of climate change. The climate crisis, biodiversity loss, and land degradation are integrally linked.

Much of the blame for degraded landscapes is on humanity’s ever-expanding need for food and the modern farming systems that produce it. The global food system is responsible for 80% of the world’s deforestation, 70% of freshwater use, and is the greatest driver of land-based biodiversity loss. Modern agriculture has altered the face of the planet more than any other human activity.

The report urges efforts at restoration of land. Restoration can take multiple forms, including planting forests and shrubs or grazing livestock and growing crops between trees instead of clearing existing forests.

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UN Report Says Humanity Has Altered 70 Percent of the Earth’s Land, Putting the Planet on a ‘Crisis Footing’

Photo, posted June 20, 2010, courtesy of Nicholas A. Tonelli 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.