Read more Environment stories from the Miami Herald

• Survey finds consensus on shale drilling's biggest risks

  Storage and treatment of liquid drilling wastes, air emissions of methane, water withdrawals for drilling, and site construction are among the biggest problems facing shale gas drilling.

• Corps will not weigh climate effects in Asia of exported coal in NW terminals' review

  The Army Corps of Engineers will not consider the climate effects of burning U.S. coal in Asia in reviews of proposed export terminals in the Pacific Northwest, an agency official testified Tuesday at a congressional hearing in Washington, D.C.

• L.A. City Council OKs ban on plastic grocery and carryout bags

  Los Angeles on Tuesday became the largest city in the nation to move toward a ban on plastic grocery bags, with the City Council barring them in supermarkets, convenience stores and any big retailer that sells groceries.