Leaders face big challenges at the 2012 climate conference

Sustainable food advocate and author Cathy Erway dishes out some winning sides for holiday eating

Mexican-American artist recycles trash into neatly arranged installations at Guggenheim Museum

Sumptuous nighttime photos of forests and stars

Project aims to transform LA billboards into aerial gardens

South African photographer documents fires in Johannesburg parks

Solar and wind accounted for all of our new electricity last month

Michigan-based artist weaves words and phrases into fences

Why California's Proposition 37 should matter to anyone who cares about food

There is a lot more to food awareness than foodie blogs, explains Anna Brones