But several other possibilities are being explored, includingcontamination or defect during manufacturing, flaws in the design or construction of the battery, and problems with battery charging.
President Obama and the White House Council on Environmental Quality are committed to clean water, and want to reduce contaminants in drinking water, includingcontamination from improperly disposed medications.
It said several thousand people had died in accidents in ship-breaking yards over the past 20 years - not including deaths from long-term contamination.