A byproduct of refining gasoline clouds the skies of a South Side Chicago neighborhood.

At MIT, a scientist is studying sea snails, and say they hold the key to "biologically inspired processing."

To help fight wildfires, officials often dump orange fire retardant from planes. But some Forest Service employees argue the substance doesn't work as promised.

The fracking boom is bringing in a surge of development — and tax revenue — to North Dakota. Now conservationists have a plan use some of that growth to protect the environment.

Golden State legislators are voting on whether to weaken a key law protecting the environment. Many say the law has been abused.

The Monterrey Bay Aquarium just released a new report on all the sea junk they've discovered over the past 22 years of underwater surveys.

The timber industry is challenging the sustainable forestry certification of the LEED green-building program state by state.

A new satellite could tell us a lot about climate change.

The vote, which will restrict the use of certain types of pesticides for two years unless decisive new information becomes available, is an effort to protect the dwindling honeybee population.

Yes, it's Arbor Day again. Don't hug a tree, plant one. Or, calculate the value of what a tree is doing for the environment.