Unknown to most Americans, a surprising number of U.S. cities have drinking water with unhealthy levels of chemicals and contaminants. Using data collected from multiple sources for five years by Environmental Working Group, 24/7 Wall St. has compiled this list of the 10 worst.
California has postponed enforcing its strict new diesel-emission standards for four years. The rules, intended to slash emissions from trucks, buses and construction equipment, had been scheduled to take effect in March 2010.
Nearly five months since the start of the massive BP oil spill, many questions are still unanswered. More than 200 million gallons of oil were released between April and August, and now a team of marine scientists thinks they know where a large portion of the oil from the BP spill has gone.