Green Energy

The clean energy breakthroughs that Silicon Valley billionaires are betting on

Michael Bloomberg gifts Sierra Club $30M to fund anti-coal efforts

Super-efficient solar power system sets record

Transparent solar windows generate energy without obstructing the view

SolarCity launches MySolar loan program for lease-shy homeowners

Super-futuristic Hong Kong skyscraper is topped with rice paddy

Wash your whites in this human-sized hamster wheel

A British supermarket that's powered by its own garbage

Spring rewind 2014: 15 singular stories worth revisiting

Trash-atlantic flights: British Airways announces waste-to-jet fuel scheme

Turkish eco-city wants to heat homes with pistachio shells

Which U.S. states produce the most energy? [Infographic]