New emission caps on greenhouse gases will add $950 to car prices but save $4,000 in fuel over the life of the car, the government says.
US gives carbon emission credits for hybrid, electric, and other alternatively fueled cars. The loophole is aimed at spurring the alternative technology.
The Obama administration set the first-ever greenhouse gas emission limits for US cars Thursday. To meet them, gas mileage standards must increase 40 percent to 35.5 miles per gallon.
Last year's White House garden wasn't big enough, Michelle Obama decided. So she expanded it this year. Already, the first lady and schoolchildren have begun planting vegetables in the popular plot.
The best say to save money on a green home renovation is to hire a knowledgeable HERS rater.
The Asian carp has gobbled up headlines as it makes its way toward the Great Lakes. Six frequently asked questions about the invasive species of fish.
Safety concerns may tarnish the reputation of the Toyota Prius. But its replacement isn't clear yet.
In a legal settlement Thursday, the EPA agreed to help states test coastal waters for acidity, and to weigh whether to tighten rules on carbon emissions to address ocean acidification.
Some oil companies are adding nitrogen to their gasoline. But does it cause pollution as well as boost performance a bit?
San Francisco's free compost, which comes from sewage sludge, is being protested by an environmental activist group, which says it may contain harmful chemicals.