Small gains in energy efficiency can create huge savings. So why isn't everyone doing it?

With a positive new federal report, offshore wind farms in the Atlantic move closer to reality

How eating consciously can affect global warming

With its market evaporating, a responsible paper company finds new uses for pulped wood

Why cutting carbon emissions is good for the economy

How our demand for organic produce is depleting aquifers south of the border

A stunning, solar-powered retreat in Colorado's San Luis Valley

New discovery could double solar electricity output

A selection of the best environment photos of 2011

Every year, 20 million pounds of discarded holiday lights make their way to Shijiao, where they're recycled into slippers and more