"The average fuel economy of new US cars and trucks hit a record 24.1 miles per gallon (mpg) last year, according to the Environmental Protection Agency. Overall fuel economy for new cars and trucks has risen almost 5 mpg since 2004."

"Pennsylvania environmental regulators are pursuing a record $4.5 million fine against a gas driller over what they describe as a major case of pollution from a leaking waste pit."

"A European Union plan to label Canadian tar sands oil as highly polluting as part of its fight against climate change has been abandoned after years of opposition from Canada, clearing the way for exports of tar sands crude to the European market."

"Here’s to the continual intellectual tussles that produce technological leaps like the super-efficient and durable LED light bulbs that are increasingly displacing incandescent and fluorescent bulbs (and sooty kerosene lamps) and garnered a Nobel Prize for three physicists on Tuesday."

"A federal water study commissioned by the Cuomo administration as it weighed a key decision on fracking was edited and delayed by state officials before it was published, a Capital review has found."

"California’s largest utility released an email Monday saying the state’s top regulator privately asked the company to donate more than $1 million to support a state-backed environmental ballot initiative."

"Methane emissions from oil and gas wells on federal lands and waters jumped 135 percent from 2008 to 2013, an analysis shows, driven by a drilling boom in New Mexico and North Dakota that has outpaced the building of pipelines and processing centers."