Four Hopeful Clean Energy Trends for Earth Day

Earth Day can serve as a reminder not only of the wonders of the natural world, but also of the perils it faces in a changing climate, especially as bad news about global warming seems to come on a daily basis. There are encouraging trends, though, that show progress against the primary cause of climate change — greenhouse gas emissions from humans extracting and burning fossil energy.


Nick Cross (CC BY-ND 2.0)