Environmental watchdogs point to mismanagement of issues like energy and waste

Sky shots capture the "horror and enchantment" of LA

Global investment in renewable energy powered to record $257 billion in 2011, according to UN report

Conservation group American Rivers urges support for clean water protection

SHFT Advisor Gary Hirshberg on why the American food system needs to label genetically modified foods

Northern Italian mountain range depicted in spectacular fashion

"Wendy," a massive, spiky installation that eats smog, wins the museum's 2012 Young Architects Award

Legislative delay means there's time for revisions

Top nature shots from Nat Geo's 2011 photo contest

The countdown to Thanksgiving is on. Remember these tips when picking your poultry