As plant hardiness zones shift from climate change, gardeners must rethink their choices. Discover what these changes mean ...

Just off the coast of Louisiana and Texas where the Mississippi River empties, the ocean is dying. The cyclical event known as the dead zone occurs ... oxygen as the plants decompose.

By Liz Kimbrough In the twilight depths of the Gulf of Mexico, about as deep down as a football field is long, U.S. Navy ...