Pittsburgh's plan to green up the city may be leaving low-income residents behind.
Can U.S. aluminum producers that use hydroelectricity distinguish their products from many Chinese producers, by touting their lower carbon footprint?
The plateau in emissions comes amid global economic growth.
Plus, these developments could be a boon for the green energy sector.
President Obama highlights his energy policy at an event in Illinois today. What’s that policy, and will it get more attention in the second term than it did in the first?