As it's announced that thee-quarters of new photovoltaic systems are going up in Europe, it's fair to ask what happened to the former U.S. dominance in solar.
A groundbreaking study of pristine national parks in the Western United States found an amazing array of airborne pollutants, including some chemicals banned for decades.
The federal government has unveiled updated designs for those informational stickers on new cars. The hope is to nudge buyers into choosing more fuel-efficient models.