"The top U.S. environmental regulator said she was 'very concerned' about fluids blamed by some for polluting water supplies near sites where drillers use them to extract natural gas from shale deposits."

"Democrats will turn the focus to energy efficiency standards and incentive programs this week with hearings in the Senate and House energy panels."

"The national oil company created after the 1938 seizure, Pemex, is entering a period of turmoil. Oil production in its aging fields is sagging so rapidly that Mexico, long one of the world's top oil-exporting countries, could begin importing oil within the decade."

"One of the stickiest points in international climate change negotiations is how to account for carbon dioxide and other greenhouse gas emissions produced to make goods that are then sold for export."

"San Joaquin Valley farmers hope for $3.3-billion dam and reservoir at Temperance Flat, but they need help paying for it."

"Activists in Mexico complain that the deforestation threatening the environmental health of Mexico has been accentuated by the granting of public areas to private companies."

"Two billion people worldwide do their cooking on open fires, producing sooty pollution that shortens millions of lives and exacerbates global warming. If widely adopted, a new generation of inexpensive, durable cook stoves could go a long way toward alleviating this problem."

"Diplomacy and energy are never far apart in the Persian Gulf. So, as American officials seek new international sanctions against Iran this week, it’s probably wise for them to remember how much the world’s global energy map has changed over the past decade."