Every year, millions of North American monarch butterflies head south for the winter -- but recently their numbers have plummeted by up to 90 percent. In Washington, responding to a petition submitted by conservation organizations, the U.S. Fish and Wildlife…

By PBS News Hour

WASHINGTON — The Agriculture Department has approved the use of genetically modified corn and soybean seeds that are resistant to a popular weed killer.

By Mary Clare Jalonick, Associated Press

Majestic Forests in Oregon at Risk from Timber Industry and Chemical Spraying…