Natural gas is cleaner than coal, but only if the industry can control its methane releases. A new report says it's doing OK, but methane releases are underestimated.
If methane leak rates are more than 3 percent of output, fracking of shale gas formations may be boosting greenhouse gas emissions rather than lowering them.
Stepp summarizes the major themes from a conference dedicated to discussing the possibility of developing and deploying all of the cheap, high-performing zero-carbon technologies necessary to meet 40 terawatts of projected global demand by mid-century.
Environmentalists say President Obama is dropping a plan to set new air-quality standards with one eye on on the presidential election. The administration says it is waiting for more research.
First US fuel efficiency rules for heavy-duty trucks, unveiled Tuesday, are embraced by trucking firms, manufacturers, and environmentalists. They'll cut fuel consumption and carbon emissions.
Proposed legislation could reduce the city’s total carbon output by 5 percent.