"CHEYENNE, Wyo. -- The federal government cleared the way for the expansion of one of the nation's biggest coal mines Thursday over the concerns of environmentalists who said the coal could contribute to climate change."

"The Obama administration on Thursday imposed strict new environmental guidelines that are expected to sharply curtail 'mountaintop' coal mining, a controversial practice that has enriched Appalachia's economy while rearranging its topography."

"Consumers will pay more for cars upfront but may save money in the long term under new rules finalized Thursday by the Obama administration that will increase fuel efficiency and for the first time set greenhouse gas emissions standards for cars and light trucks."

"A genetically engineered pig recently approved for limited production in Canada makes urine and feces that contain up to 65 percent less phosphorous, officials have announced."

"The EPA  on Wednesday struck down a Texas air-pollution program that has let thousands of companies bypass rigorous reviews under the Clean Air Act."

"JPMorgan backstops one of the most destructive mining practices in the world: mountaintop removal coal mining. And it continues to do so even as other major banks have cut ties to this practice."

"MEXICO CITY -- This megalopolis once had the world's worst air, with skies so poisonous that birds dropped dead in flight. Today, efforts to clean the smog are showing visible progress, revealing stunning views of snow-capped volcanoes -- and offering a model for the developing world."

"The federal government and environmental groups reached an agreement Wednesday that will mean the end of the ghost fleet of retired ships in Suisun Bay."

"African-American residents of Mossville, a community just west of Lake Charles, have won a hearing before the Inter-American Commission on Human Rights on charges that the U.S. government has violated their rights to privacy and racial equality in not forcing local chemical plants to stop polluting."

"Exposure to certain chemicals and pollutants before a woman reaches her mid-30s could treble her risk of developing breast cancer after the menopause, Canadian scientists said on Thursday."