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NASA says that a ban on CFCs enacted in the 1980s has contributed to a 4 percent rebound since 2000 in atmospheric ozone in mid-northern latitudes.

The New Guinea flatworm is a vicious little thing with an appetite for snails. Its discovery in Normandy has raised concerns about the fate of Europe's snails — and France's famed mollusk appetizer.

One environmental group argues that to save wildlife, we should replace the meat in our diets with plants. But others counter that it's not so simple: Many livestock producers help conserve wildlife.

On Titan, summer is almost three years away. But in a dark, placid ocean of natural gas, scientists have spotted something that could be the first inkling of springtime.

A new NOAA-led study has found that hurricanes, typhoons and tropical cyclones are at their most destructive about 90 miles farther north or south of the equator than three decades ago.

World's Fairs still exist, but just two cities bid to host the 2017 Expo. In contrast, seven U.S. cities are vying for the 2024 Olympics, and the games just signed a $7.75 billion deal with NBC.

The Port of Seattle has leased space to Shell Oil to dock ships and store Arctic drilling rigs in the off season. City officials and environmentalists question that decision and want Shell out.

Once embraced by cities for its beautiful white flowers, disease resistance and ability to grow just about anywhere, the Callery pear is now considered a nuisance due to its smell and invasive nature.

Many coastal communities that harvest shellfish could soon be hurt by ocean acidification, a study finds. The Pacific Northwest and New England are hot spots, as are estuaries along the East Coast.

In a prisoner swap this week, a militant group released 19 of 31 Afghan Hazara men kidnapped in February. The kidnapping raised fears in this minority community of being targeted in sectarian attacks.