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Aerosols reactions can impact global warming assessment, yet they are often not a significant factor in models

Some so-called greenhouse gases trap heat and boost the planet's surface temperature, which keeps the Earth habitable. Past climatic events have shown that temperatures can move into ranges that would be harmful to current biota, including humans. Key drivers of such changes are CO2 concentrations...

Arctic seafloor is "leaking" methane

As noted in prior posts, the evidence for climate change can be found in the many changes occurring across the globe. One of the most disturbing such events is the recent evidence that the Arctic seafloor is emitting methane into the atmosphere. As noted in several prior posts, methane is a significant...

Environmental Protection Agency Affirms Greenhouse Gas Emissions Endangerment Finding

WASHINGTON, D.C. - (Mealey's) The U.S. Environmental Protection Agency on July 29 denied 10 petitions challenging its Dec. 7 determination that greenhouse gas emissions are a threat to public health and must be regulated under the Clean Air Act. The finding allows the federal government to regulate...

California sets forth indicators of disproportionate impacts of climate change on environmental justice communities

To assist Cal-EPA with the examination of potential environmental justice concerns associated with climate change, Cal-EPA requested the Office of Environmental Health Hazard Assessment (OEHHA) [best known for its role in setting drinking water related Public Health Goals and in overseeing much of the...

Natural gas development poses a risk of enhancing GHG emissions due to "leakage", note new studies

Several prior posts have noted the greenhouse impact of methane (aka natural gas); it has many times the warming effect as carbon dioxide (CO2), which seems to be the focus of so much discussion about global warming. The posts have focused on the numerous "natural" sources of methane emissions...

Can addressing air pollution decrease global warming? You betcha

Prior posts have noted the adverse health impacts from small particles, often referred to generally as PM10 and/or PM2.5. Prior posts have also noted the adverse impact of soot on global warming, which because it is black and absorbs heat warms up the atmosphere and whatever it is coating (e.g., glaciers...

Proposed Rules Seek to Cut Methane Emissions at Landfills

By Ethan R. Ware , Partner, Williams Mullen EPA has issued a proposed rule and a supplemental proposal to a July 14, 2015 proposed rule that are designed to achieve additional reductions of landfill gas (LFG) and its components, including methane, by lowering the emissions threshold at which emission...