Word: co2
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...most of the attention when it comes to greenhouse gases, but it's not the only one that's warming the earth. Methane - a gas that is found in everything from landfills to cow stomachs - also plays a big role. Although global methane-emissions levels are much lower than CO2 emissions, pound for pound methane is a more powerful greenhouse gas; a ton of it has 23 times the warming effect of a ton of CO2. And methane, like CO2, is on the rise thanks to us: about 60% of global methane emissions come from man-made sources...
...Separating the factors that contribute to climate change from the things that help reverse it is not always easy because sometimes they're one and the same. Trees sop up CO2, for example, but when they die and decay they release it back into the air. Wetlands and rice paddies serve a similarly dual role for both CO2 and methane, acting as sources and sinks simultaneously. The challenge has been trying to tease out how those two functions balance out, but a new paper in the Jan. 14 issue of Science has provided some hard numbers. Using satellite data, investigators...
...little-known source that is not covered by any national or international regulations: global marine shipping. The massive container ships that ply the ocean lanes are the backbone of globalization, but they are also carbon hogs. Each year, about 100,000 ships contribute some 1.3 billion tons of CO2 to the atmosphere, about 3% of global carbon emissions. In addition, ships spew out huge amounts of traditional air pollutants, like nitrous oxides (NOx) and sulfur oxides (SOx), and emit black carbon soot, a leading contributor to melting Arctic ice. "It's an overlooked and important problem, but it's also...
...question, even burying analysis from its own scientists in the waning months of that Administration. When President Barack Obama took office, he directed the new EPA to kick-start the regulation process - nearly 11 months and 380,000 public comments later, the agency is now poised to regulate CO2 as a pollutant. "This cements 2009's place in history as the year the U.S. government began seriously addressing the challenge of greenhouse-gas pollution," said Jackson...
...their part, business groups and many conservatives remain even more opposed to the possibility of EPA regulation of greenhouse gases than they do to a cap-and-trade bill. They say CO2 is far more prevalent than any other pollutant the EPA has ever attempted to regulate under the Clean Air Act and that top-down regulation would lay a heavy burden on U.S. business. "An endangerment finding from the EPA could result in a top-down command-and-control regime that will choke off growth by adding new mandates to virtually every major construction and renovation project," said...