John,

Air pollution is threatening the survival of many imperiled and endangered species. Pollution from fossil fuel power plants, fracking, and factories is taking a terrible toll on clean water and healthy landscapes. Species already on the brink of extinction — like whooping cranes, Chiricahua leopard frogs, and American bumblebees — are losing more ground in the face of acid rain, nitrogen air pollution, and toxic soot.

We have the chance to change that. Right now the U.S. Environmental Protection Agency is deciding whether to strengthen air-quality standards meant to protect wildlife, plants, and the places they call home.

Even some of the most iconic and critical landscapes are at risk. In Colorado nitrogen air pollution from feedlots and factories is smothering Rocky Mountain National Park, polluting its headwaters and pushing its alpine ecosystem to the brink.

The Clean Air Act says air-quality standards shouldn’t just protect human health — they should also protect the health of plants and animals. The science leaves no doubt: More must be done.

Tell the EPA to address air pollution and protect endangered species.