The White House may have just accidentally sparked a revolution in efforts to address climate change.
Since 1892, the Sierra Club has been working to protect communities, wild places, and the planet itself. It's the oldest, largest, and most influential grassroots environmental organization in the United States.
As the seas rise, presidential candidates are arguing over whose wife is hotter.
Liquefied natural gas is a disaster for both public health and the climate.
Some leaders are taking climate concerns and the need for greener energy more seriously than others.
Even when air-quality alerts give parents the all clear, kids could still be breathing in dangerous chemicals.
Big tech companies like Google and Facebook are breaking up with corporate polluters.
The vast mines stripping Alberta's tar sands are wrecking old-growth forests.
The new carbon-cutting standard gives every state the opportunity to chart its own energy future.