Between 2007 and 2011, carbon emissions from coal use in the U.S. dropped 10 percent. During the same period, emissions from oil use dropped 11 percent. In contrast, carbon emissions from natural gas use increased by 6 percent. The net effect of these trends was that U.S. carbon emissions dropped 7 percent in four years. And this is only the beginning.
The initial fall in coal and oil use was triggered by the economic downturn, but now powerful new forces are reducing the use of both. For coal, the dominant force is the Beyond Coal campaign, an impressive national effort coordinated by the Sierra Club involving hundreds of local groups that oppose coal because of its effects on human health.
In the first phase, the campaign actively opposed the building of new coal-fired power plants. This hugely successful initiative, which led to a near de facto moratorium on new coal plants, was powered by Americans’ dislike of coal. An Opinion Research Corporation poll found only 3 percent preferred coal as their electricity source—which is no surprise. Coal plant emissions are a leading cause of respiratory illnesses (such as asthma in children) and mercury contamination. Coal burning causes 13,200 American deaths each year, a loss of life that exceeds U.S. combat losses in 10 years of war in Afghanistan and Iraq.
The campaign’s second phase is dedicated to closing existing coal plants. Of the U.S. total of 492 coal-fired power plants, 68 are already slated to close. With current and forthcoming U.S. Environmental Protection Agency air quality regulations on emissions of mercury, sulfur and ozone precursors requiring costly retrofits, many more of the older, dirtier plants will be closed.
In August, the American Economic Review—the country’s most prestigious economics journal—published an article that can only be described as an epitaph for the coal industry. The authors conclude that the economic damage caused by air pollutants from coal burning exceeds the value of the electricity produced by coal-fired power plants. Coal fails the cost-benefit analysis even before the costs of climate change are tallied.
In July 2011, New York Mayor Michael Bloomberg announced a grant of $50 million to the Beyond Coal campaign. It is one thing when Michael Brune, head of the Sierra Club, says that coal has to go, but quite another when Michael Bloomberg, one of the most successful businessmen of his generation, says so.
The move to close coal plants comes at a time when electricity use for lighting will be falling fast as old-fashioned incandescent light bulbs are phased out. In compliance with the Energy Independence and Security Act of 2007, by January 2012 there will be no 100-watt incandescent light bulbs on store shelves. By January 2014, the 75-watt, 60-watt and 40-watt incandescents will also disappear from shelves. As inefficient incandescents are replaced by compact fluorescents and LEDs, electricity use for lighting can drop by 80 percent. And much of the switch will occur within a few years.
The U.S. Department of Energy projects that residential electricity use per person will drop by 5 percent during this decade as light bulbs are replaced and as more-efficient refrigerators, water heaters, television sets and other household appliances come to market.
Even as coal plants are closing, the use of wind, solar and geothermally generated electricity is growing fast. Over the last four years, more than 400 wind farms—with a total generating capacity of 27,000 megawatts—have come online, enough to supply 8 million homes with electricity. (See data at www.earth-policy.org.) Nearly 300,000 megawatts of proposed wind projects are in the pipeline awaiting access to the grid.
Texas, long the leading oil-producing state, is now the leading generator of electricity from wind. When the transmission lines linking the rich wind resources of west Texas and the Texas panhandle to the large cities in central and eastern Texas are completed, wind electric generation in the state will jump dramatically.
In installed wind-generating capacity, Texas is followed by Iowa, California, Minnesota and Illinois. In the share of electricity generation in the state coming from wind, Iowa leads at 20 percent.
With electricity generated by solar panels, the U.S. has some 22,000 megawatts of utility-scale projects in the pipeline. And this does not include residential installations.
Closing coal plants also cuts oil use. With coal use falling, the near 40 percent of freight rail diesel fuel that is used to move coal from mines to power plants will also drop.
In fact, oil use has fallen fast in the U.S. over the last four years, thus reversing another long-term trend of rising consumption. The reasons for this include a shrinkage in the size of the national fleet, the rising fuel efficiency of new cars, and a reduction in the miles driven per vehicle.
Fleet size peaked at 250 million cars in 2008 just as the number of cars being scrapped eclipsed sales of new cars. Aside from economic conditions, car sales are down because many young people are much less automobile-oriented than their parents.
In addition, the fuel efficiency of new cars, already rising, will soon increase sharply. The most recent efficiency standards mandate that new cars sold in 2025 use only half as much fuel as those sold in 2010. Thus with each passing year, the U.S. car fleet becomes more fuel-efficient, using less gasoline.
Miles driven per car are declining because of higher gasoline prices, the continuing recession and the shift to public transit and bicycles. Bicycles are replacing cars as cities create cycling infrastructure by building bike paths, creating dedicated bike lanes and installing sidewalk parking racks. Many U.S. cities, including Washington, D.C., Chicago and New York, are introducing bike-sharing programs.
Furthermore, when people retire and no longer commute, miles driven drop by a third to a half. With so many baby boomers now retiring, this too will lower gasoline use.
As plug-in hybrid and all-electric cars come to market, electricity will replace gasoline. An analysis by Professor Michael McElroy of Harvard indicates that running a car on wind-generated electricity could cost the equivalent of 80-cent-a-gallon gasoline.
With emissions from coal burning heading for a free fall as plants are closed, and those from oil use also falling fast—both are falling faster than emissions from natural gas are ramping up—U.S. carbon emissions are falling.
We are now looking at a situation where the 7 percent decline in carbon emissions since the 2007 peak could expand to 20 percent by 2020, and possibly even to 30 percent. If so, the U.S. could become a world leader in cutting carbon emissions and stabilizing climate.
For more information, click here.
For additional data and resources, click here.
Lester R. Brown is president of the Earth Policy Institute and author of World on the Edge.
EcoWatch Daily Newsletter
In Major Win for Indigenous Rights, Supreme Court Rules Much of Eastern Oklahoma Is Still a Reservation
Much of Eastern Oklahoma, including most of Tulsa, remains an Indian reservation, the Supreme Court ruled on Thursday.
- Federal Judge Orders Trump Admin to Give Native Americans Their ... ›
- Police Were Ready to Shoot Indigenous Pipeline Protesters in ... ›
- Climate Justice, Indigenous Rights Advocates Rally for Wet'suwet'en ... ›
By Tiffany Means
Summer and fall are great seasons to enjoy the outdoors. But if you're already spending extra time outside because of the COVID-19 pandemic, you may be out of ideas on how to make fresh-air activities feel special. Here are a few suggestions to keep both adults and children entertained and educated in the months ahead, many of which can be done from the comfort of one's home or backyard.
The coronavirus may linger in the air in crowded indoor spaces, spreading from one person to the next, the World Health Organization acknowledged on Thursday, as The New York Times reported. The announcement came just days after 239 scientists wrote a letter urging the WHO to consider that the novel coronavirus is lingering in indoor spaces and infecting people, as EcoWatch reported.
- Airborne Coronavirus Transmission Must Be Taken Seriously, 239 ... ›
- Trump Halts WHO Funding Amidst Criticism of His Own Coronavirus ... ›
- Here's Why COVID-19 Can Spread So Easily at Gyms and Fitness ... ›
- Is the New Coronavirus Airborne? A Study From China Finds Evidence ›
By Angela Nicoletti
The eastern slopes of the Andes Mountains in central Perú are among the most remote places in the world.
- Global Frog Pandemic May Become Even Deadlier as Strains ... ›
- New Species of Diamond Frog Discovered in Remote Pocket of ... ›
- Frogs Are on the Verge of Mass Extinction, Scientists Say - EcoWatch ›
A new analysis by scientists at the Swiss-based International Union for Conservation of Nature (IUCN) found that lemurs and the North Atlantic right whale are on the brink of extinction.
- Trump Admin Denies Endangered Species Protections to Pacific ... ›
- Trump Admin Failed to Protect 241 Species From Extinction ... ›
- New Border Wall Construction Threatens 8 Species With Extinction ... ›
By Julia Vergin
It is undisputed that vitamin D plays a role everywhere in the body and performs important functions. A severe vitamin D deficiency, which can occur at a level of 12 nanograms per milliliter of blood or less, leads to severe and painful bone deformations known as rickets in infants and young children and osteomalacia in adults. Unfortunately, this is where the scientific consensus ends.
Where Does the Deficiency Begin?<p>Nobody knows exactly how much vitamin D a person actually needs. The question of when a deficiency starts is correspondingly controversial. However, vitamin D is becoming increasingly popular.Not only is the pseudo-scientific literature on the "sun vitamin" experiencing an upswing, but the number of published studies has also increased enormously in recent years. For example, in 2019 <a href="https://academic.oup.com/edrv/article/40/4/1109/5126915" target="_blank">a study found that</a> Vitamin D is responsible for keeping the skeleton functional and is associated with cardiovascular diseases, type 2 diabetes and various types of cancer. <br></p>
An All-Rounder<p>Vitamin D levels in the body rise and fall according to sun exposure. If sufficient UV rays reach the skin, the body is able to produce the vitamin itself. However, the human body only derives an estimated 10 to 20 percent of its daily requirement from food.</p><p>The vitamin D that we synthesize from sunlight or food is not biologically active at first. Before the kidneys can produce the biologically active form of the vitamin, known as calcitriol, and release it into the blood, some metabolic processes must take place beforehand.</p><p>In addition, many organs have receptors to which the precursor of calcitriol binds. Further, this substance is also present in blood.</p><p>From this precursor, the organs then produce calcitriol themselves, which the body then uses for countless other processes in the body. This form of vitamin D thus regulates insulin secretion, inhibits tumor growth, and promotes the formation of red blood cells as well as the survival and activity of macrophages, which are important for the <a href="https://www.mdpi.com/2072-6643/5/7/2502/htm" target="_blank">immune system.</a></p>
Low Vitamin D, Severe COVID-19 Disease?<p>A research study carried out <a href="https://www.sciencedirect.com/science/article/pii/S2352364620300067?via%3Dihub" target="_blank">at the University of Hohenheim</a> has now established a link between vitamin D deficiency, certain previous diseases, and severe cases of COVID-19.</p><p>According to the study, "there is a lot of evidence that several non-communicable diseases (high blood pressure, diabetes, cardiovascular diseases, metabolic syndrome) are associated with low vitamin D plasma levels. These comorbidities, together with the often accompanying vitamin D deficiency, increase the risk of severe COVID-19 events."</p><p>"This statement is completely correct," said Martin Fassnacht, head of endocrinology at the University Hospital of Würzburg. However, he qualifies that it is a pure association, "i.e. a mere observation that these events occur together.</p><p>Dr. Fassnacht is very critical of the hype surrounding vitamin D, but not because he denies the vitamin serves important functions. However, studies on humans have not been able to show that vitamin D has the healing powers many often propagate.</p><p>Fassnacht says, "If you take a closer look, the hopes that the administration of vitamin D has a healing effect have not been confirmed so far."</p>
Association Versus Intervention Studies<p>Many studies on the vitamin are association or observational studies. "By definition, these studies cannot prove the causal relationship, but only point to mere correlations," said Fassnacht. The physician tries to illustrate this with an example:</p><p>"Imagine two groups of 80-year-olds. One group is spry, active and does sports. If you compare them with another group living in nursing homes, the difference in vitamin D levels will be dramatic. Life expectancy would also be extremely different."</p><p>But to try to explain the difference in fitness by vitamin D status alone is far too simplistic. "Vitamin D levels are a good measure of how sick someone is. But not more," says Fassnacht. </p><p>According to Fassnacht, none of the intervention studies carried out to date -- that specifically examined the effect of vitamin D on various diseases -- has been able to confirm the previous association and laboratory studies or the presumed positive effect of vitamin D.</p>
Further Research Is Needed<p>"If a coronavirus infection is suspected, it is therefore absolutely necessary to check the vitamin D status and quickly correct any possible deficit," said the recommendation of the paper published by the University of Hohenheim.</p><p>"Studies are underway to see whether vitamin D helps in COVID-19 infection, but I personally do not believe that this is really the case," says endocrinologist Fassnacht. Nevertheless, he says it is of course useful to carry out these studies.<br></p><p>"I don't want to rule out that there are actually subgroups of people who benefit from an additional vitamin D dose," he says. After all, this has been proven to be the case with a severe deficit.</p><p>In view of the study situation, Fassnacht does not think much of preventive, nationwide vitamin D substitutes. "My belief that the vitamin helps somewhere is very low. But, of course, I can be wrong."</p>
- 8 Ways to Tell if You Are Vitamin D Deficient - EcoWatch ›
- 7 Healthy Foods That Are High in Vitamin D - EcoWatch ›
- 7 Nutrient Deficiencies That Are Incredibly Common ›
Ocean scientists have been busy creating a global network to understand and measure changes in ocean life. The system will aggregate data from the oceans, climate and human activity to better inform sustainable marine management practices.
EcoWatch sat down with some of the scientists spearheading the collaboration to learn more.
Climate models are predicting faster warming of the North Atlantic Ocean, which will shift the Gulf Stream. NASA
- Could the Climate Crisis Spell the End for Maine Lobster? - EcoWatch ›
- 5 Reasons Why Biodiversity Matters - EcoWatch ›
- World Leaders, Media Ignore Biodiversity Report Detailing Mass ... ›
- The Top 10 Ocean Biodiversity Hotspots to Protect - EcoWatch ›