The Obama administration on Tuesday announced a $510 million initiative to boost the production of next-generation biofuels.

People living in Ohio, Pennsylvania and Florida are most at risk in the United States from toxic emissions spewing from coal and oil-fired power plants, two leading American environmental groups said in a report on Wednesday.

Electricity generation and chemical processing were the top culprits for dangerous emissions, which can lead to or worsen ailments such as asthma and cancer, according to

The Energy Department said on Tuesday it would install 18 fuel cell backup power systems at eight U.S. military posts, as part of a partnership with the Defense Department to bolster energy security.

"Projects like these fuel cell systems will help reduce fossil fuel use and improve energy reliability at military installations across the country," Energy Secretary Steven Chu said at the U.S.