Vera Cole is president of the Mid-Atlantic Renewable Energy Association, a group arguing against proposed rules in Pennsylvania that would put stricter limits on how much grid-connected solar power homeowners can produce on their property. Jeff Brady/NPR hide caption
The new rules' would reduce harmful emissions, the EPA says. David Paul Morris/Getty Images hide caption
Greenpeace's annual report ranks Internet companies based on the efficiency of their cloud facilities. szaz/iStockphoto.com hide caption