The Diane Rehm Show

In this month's environmental outlook, as worldwide demand for air conditioning is growing, so is concern over how increased use will contribute to global warming. The search for a cleaner way to cool.

For this month's Environmental Outlook: protecting the world's oceans. A noted marine conservationist on how people are harming the seas with overfishing, pollution and greenhouse gases, and what can be done.

Tennessee's legislature approved a bill that allows teachers to challenge theories of evolution and global warming. An update on the debate over science education.

Organic food has become a $30 billion industry in the U.S. For this month's Environmental Outlook: How growing demand challenges core values of organic farming.