An unprecedented boom in hydropower dam construction is underway, primarily in developing countries and emerging economies. While this is expected to double the global hydropower electricity production, it could reduce the number of remaining large free-flowing rivers by 20% and pose a threat to freshwater biodiversity. A new database has been developed in Denmark to support decision making on sustainable modes of electricity production.
In Pennsylvania's gas drilling boom, newer and unconventional wells leak far more often than older and traditional ones, according to a study of state inspection reports for 41,000 wells. The results suggest that leaks of methane could be a problem for drilling across the nation, but the research is being criticized by the energy industry.
The U.S. government rolled out a plan Monday to cut carbon dioxide emissions from power plants by 30% by 2030, a centerpiece of President Barack Obama's efforts to reduce the pollution linked to global warming. The rule, expected to be final next year, sets in motion one of the most significant actions on global warming in U.S. history.
The most important fertilizer for producing food is, at the same time, one of the most important risks for human health: nitrogen. If no action is taken, nitrogen pollution could rise by 20% by 2050 in a middle-of-the-road scenario, according to a study now published by scientists of the Potsdam Institute for Climate Impact Research. This research also shows that ambitious mitigation efforts could decrease the pollution by 50%.
After concluding that global warming almost certainly is man-made and poses a grave threat to humanity, the U.N.-sponsored Intergovernmental Panel on Climate Change, or IPCC, is meeting next week in Berlin to chart ways in which the world can curb the greenhouse gas emissions that scientists say are overheating the planet. It is also trying to give estimates on what it would cost.
National efforts in the last decade to clear the air of dangerous particulate matter have been so successful that most urban areas have already attained the next benchmark, according to new research by Rice Univ. Atmospheric researchers at Rice studied the state implementation plans from 23 regions mandated by the EPA to reduce particulate matter (PM) smaller than 2.5 um (PM 2.5) to less than 15 micrograms per cubic meter by 2009.
Colorado's proposal to curb air pollutants from oil and gas operations got praise from industry representatives and environmental activists Thursday at its first hearing. But both sides warned the Colorado Air Quality Control Commission that there will still be haggling over the particulars of three rule changes introduced this week.
The first trickle of fuels made from agricultural waste is finally winding its way into the nation's energy supply. But the full benefits of this fuel source remain many years away, and ethanol, which was meant to be a stop-gap until non-food sources of fuel were found, has been far more damaging to the environment than the government predicted.
Across the Dakotas and Nebraska, more than 1 million acres of the Great Plains are giving way to cornfields as farmers transform the wild expanse that once served as the backdrop for American pioneers. This expansion of the Corn Belt is fueled in part by America's green energy policy, which requires oil companies to blend billions of gallons of corn ethanol into their gasoline.
A new study shows that the reduction of pollution emissions from power plants in the mid-Atlantic is making an impact on the quality of the water that ends up in the Chesapeake Bay. The study confirms a decreased amount of emissions of nitrogen oxide from coal-fired power plants.
The trial resumes Monday for the federal litigation spawned by BP's massive 2010 oil spill in the Gulf of Mexico, with a focus on the company's response to the deadly disaster. At the start of the trial's second phase, U.S. District Judge Carl Barbier is expected to hear two hours of opening statements from lawyers for BP and for Gulf Coast residents and businesses who claim the spill cost them money.
The U.S. Environmental Protection Agency (EPA) has launched a web-based tool, called ChemView, to significantly improve access to chemical specific regulatory information developed by EPA and data submitted under the Toxic Substances Control Act. The tool displays key health and safety data in an online format that allows comparison of chemicals by use and by health or environmental effects.
Supporters and opponents of fracking in the political hotbed where New York's natural gas deposit lies lined the route being taken Friday by visiting President Barack Obama, shouting messages for him while trying to pressure Gov. Andrew Cuomo as he weighs whether to allow the practice in New York.
Findings from a Univ. of Alberta researcher shed new light on what may be stopping people from recycling more. Jennifer Argo, a marketing prof. in the U of A’s Alberta School of Business, says that people are psychologically hard-wired to believe that products that are damaged or that aren’t whole are useless, and this leads users to trash them rather than recycle them.
The world’s croplands could boost food available for people by 70% without clearing more land, according to research from the Univ. of Minnesota. This could be accomplished just by shifting from producing animal feed and biofuels to producing exclusively food for human consumption, researchers say.
A landmark federal study on hydraulic fracturing, or fracking, shows no evidence that chemicals from the natural gas drilling process moved up to contaminate drinking water aquifers at a western Pennsylvania drilling site. After a year of monitoring, the researchers found that the chemical-laced fluids used to free gas trapped deep below the surface stayed thousands of feet below the shallower areas that supply drinking water
Three weeks after giving an ambitious speech to outline his climate change proposal, President Obama begins the arduous task of executing it. His plan is a complicated mix of rulemaking and federal permitting that's tough to encapsulate in a neat sales pitch—and may be even tougher to put into action.
President Barack Obama's push to fight global warming has triggered condemnation from the coal industry across the industrial Midwest, where state and local economies depend on the health of an energy sector facing strict new pollution limits. But such concerns stretch even to New England, an environmentally focused region that long has felt the effects of drifting emissions from Rust Belt states.
The Environmental Protection Agency has dramatically lowered its estimate of how much of a potent heat-trapping gas leaks during natural gas production. This shift has major implications for a debate that has divided environmentalists, which is whether the recent boom in fracking helps or hurts the fight against climate change.
Geoengineering, the use of human technologies to alter the Earth's climate system has emerged as a potentially promising way to mitigate the impacts of climate change. But such efforts could present unforeseen new risks. That inherent tension, argue two professors, has thwarted both scientific advances and the development of an international framework for regulating and guiding geoengineering research.
Facing public outrage over smog-choked cities and filthy rivers, China's leaders are promising to clean up the country's neglected environment—a pledge that sets up a clash with political pressures to keep economic growth strong.
Environmental groups hailed President Barack Obama's warning about climate change in his second inauguration speech, but said the president's words will soon be tested as he decides whether to approve the Keystone XL oil pipeline from Canada. Obama pledged Monday to respond to what he called "the threat of climate change," saying the failure to do so would be a betrayal of the nation's children and future generations.
U.N. officials say more than 130 nations have adopted the first legally binding international treaty aimed at reducing mercury emissions. The U.N. Environment Program says the treaty was adopted Saturday morning, after all-night negotiations that capped a week of talks.
In the Colorado mountains, a spike in air pollution has been linked to a boom in oil and gas drilling. About 800 miles away on the plains of north Texas, there's a drilling boom, too, but some air pollution levels have declined. Opponents of drilling point to Colorado and say it's dangerous. Companies point to Texas and say drilling is safe.
As climate change begins to take the spotlight again as a political issue in the U.S., a once radical idea has resurfaced among both Republicans and Democrats: a carbon tax. On Tuesday, a conservative think tank held discussions about it while a more liberal think tank released a paper on it. And the Congressional Budget Office issued a 19-page report on the different ways to make a carbon tax less burdensome on lower income people.
Increasing demand for bioenergy feedstock is generating land-use conflicts and food vs. fuel controversies. An team of 11 scientists from seven European countries and the United States have recently published a study that gives scientific background to the debate. It supports a reassessment of the land available for bioenergy feedstock production.
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