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...

EPA Finalizes Greenhouse Gas Reporting Requirements for Petroleum and Natural Gas Industry

Reporting targets methane, a potent greenhouse gas and valuable fuel WASHINGTON - The U.S. Environmental Protection Agency (EPA) has finalized greenhouse gas (GHG) reporting requirements for the petroleum and natural gas industries as part of the mandatory reporting program. The petroleum and natural...

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...

Where is the methane from the BP Deepwater Horizon blowout?

Natural gas in various forms comprised approximately 2/3 of the hydrocarbons emitted from the Deepwater Horizon well blowout. Methane is believed to compose an estimated 87.5% of that natural gas. Sampling in June 2010 found no microbial breakdown of methane. [See http://www.sciencemag.org/content/330...

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...

Fracking, Methane and Drinking Water

By Dianne Saxe, Ontario Environmental Lawyer The Ernst v. Encana fracking lawsuit gained strength last month with the publication of Rob Jackson's peer-reviewed paper: Methane contamination of drinking water accompanying gas-well drilling and hydraulic fracturing . Jackson is a professor at Duke...

Major Changes Proposed for Shale Gas Fracking

By Dianne Saxe, Ontario Environmental Lawyer Advisors to US Energy Secretary, Stephen Chu, have recommended major changes to improve regulation and environmental performance of shale gas fracturing (fracking) in the US. Public consultation is continuing, and the final report will be released in November...

EPA Announces Schedule to Develop Natural Gas Wastewater Standards

Announcement is part of administration's priority to ensure natural gas development continues safely and responsibly WASHINGTON - The U.S. Environmental Protection Agency (EPA) is announcing a schedule to develop standards for wastewater discharges produced by natural gas extraction from underground...

USEPA Promulgates New Fracking Air Rules

By Marc Karell, P.E., CEM, Principal, Climate Change & Environmental Services, LLC While the focus of the environmental controversy concerning hydraulic fracturing ("fracking") has been the alleged contamination of aquifers and other drinking water supplies, a recent U. of Colorado study...

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 Federal Strategies to Reduce Methane Emissions

While energy conservation, reducing fossil fuel combustion to reduce greenhouse gas (GHG) emissions, is important to combat climate change, another GHG of importance is methane (CH 4 ), which is 21 times more potent than CO 2. CH 4 emissions do not derive from combustion, but instead from natural decomposition...

Ohio’s Fugitive Emissions Regulations

By Zahava Bennett and Eli Humphries Many energy prospectors, including the T. Boone Pickens, have viewed natural gas as a bridge fuel leading to a more sustainable future. Although natural gas burns cleaner than other fossil fuels, there is concern that a valuable resource is being wasted and additional...