1.) Host Peter Berle discusses an agreement between the United States and Mexico to clean up an airshed between Texas and Mexico. Berle talks with economist Pete Emerson of the Environmental Defense Fund about the issue. 2.) Berle talks with Tom Crouch of the Air and Space Museum about the world's fascination with kites. 3.) Thomas Lalley reports on a story about multi-national corporations following the hierarchy of reduce, reuse, and recycle. He talks with Nancy Hirschfield of Stonyfield Farm. 4.) In the Earth Calendar segment Berle talks with Donna Shafer of the National Biological Service about the endangered Kemp's Ridley sea turtle.