"WASHINGTON -- The Environmental Protection Agency's latest proposed tightening of limits on sulfur in gasoline, and its previous rules, will most likely have the perverse consequence of retarding the development of cars running on batteries, advanced biofuels or hydrogen -- all promising but expensive technologies that have not become mass-market products."

"The so-called 'Monsanto Protection Act,' a controversial provision protecting the biotech giant from litigation, has found an unusual critic in the tea party."

"LITTLE ROCK, Ark. -- Federal pipeline safety officials on Tuesday issued a corrective action order to ExxonMobil Pipeline Co. after one of its pipelines ruptured last week in central Arkansas."

"SPRINGFIELD, Ill. -- Dominion Energy has agreed to pay a $3.4 million civil penalty and spend $9.75 million on environmental mitigation projects to resolve Clean Air Act violations at coal-fired power plants in three states."

"Tesla sold more of its electric cars than expected in the first three months of the year, and it adjusts its first-quarter guidance to 'full profitability.'"

"Current climate-induced drought is slipping into a trend that scientists say resembles some of the worst droughts in U.S. history, like the Dust Bowl."

"These are good times for Libbey, a 125-year-old American glassmaker that nearly went bankrupt four years ago. The company’s shares have risen to almost $20 from below $1, sales of its tableware are at a record high, and its energy-intensive factories saved more than $5 million in 2012 as natural gas prices fell."

"MAYFLOWER, Ark. -- An ExxonMobil pipeline carrying tar sands oil from Canada broke open in Arkansas on Friday, spilling thousands of gallons of black diluted bitumen into residential streets outside Little Rock and forcing the evacuation of 22 homes."

"WASHINGTON -- The U.S. Supreme Court on Monday rejected a challenge by the oil lobby disputing a U.S. Environmental Protection Agency air pollution rule."

"James E. Hansen, the climate scientist who issued the clearest warning of the 20th century about the dangers of global warming, will retire from NASA this week, giving himself more freedom to pursue political and legal efforts to limit greenhouse gases."