"As President Obama pushes for ratification of his signature nuclear treaty with Russia in coming days, all eyes are on one Republican."

"At least one energy measure will see congressional action this week, and a handful of hopeful Senate Democrats have lofty plans to cut through the partisan gridlock of recent months to move several climate and energy bills by year's end."

"They wind underground beneath homes, across plains and through the state's most populous cities. And, according to a Houston Chronicle investigation, more than half of the major natural gas transmission lines in Texas were laid more than 40 years ago and now are vulnerable to failure."

"The Obama administration plans to reallocate money designated for high-speed rail if the states granted the funds reject them."

The possibility of producing natural gas from shale formations beneath central Quebec is raising the same debate about its perils and promises as is raging in U.S. states.

"An environmental group has filed a formal notice that it will sue the Environmental Protection Agency and the Coast Guard for authorizing oil dispersants without studying how they'll affect Alaska's polar bears, Cook Inlet beluga whales, Steller sea lions and other imperiled species."

Only 21 percent of Americans believe genetically engineered foods are safe, a new poll shows.

"The Russian energy giant Gazprom has joined a growing list of companies that plan to drill for oil in the waters off Cuba, close to the United States but out of reach of its safety regulators."

"Not only is Earth's surface warming, but the troposphere -- the lowest level of the atmosphere, where weather occurs -- is heating up too, U.S. and British meteorologists reported on Monday." The findings may put to rest a 20-year-old controversy over differences between satellite and surface measurements of warming.

"Michiganders don't have to worry much about having an adequate supply of water. But efforts by Nestlé to bottle water in the state, and the prospect of drier times in a climate-changed future, are leading some residents to try to put Michigan groundwater under permanent protection."