- A Hole in the Ozone - Acid Rain - Aerosols - Climate Variability - Extreme Weather - Signs of Warming - The Greenhouse Effect - Carbon Sequestration - Ice Ages - Island Earth - Landslides - Tales Told By Trees - Amphibian Alarm - Biodiversity - Coral Reefs - Ecosystem Services - Fire Dependent Ecosystems - Global Change in Mountain Ecosystems - Mass Extinctions - North America's Thawing Cap - Phytoplankton - A Changing World - Changes in the Chesapeake Bay - City Lights - Future Energy Supplies - Material World - The Human Footprint - The Return of the Wolf - World Population - Future Forest Fires - Mortenson Ranch - Native Ecology - Prairie Potholes - Precision Agriculture - Fresh Water - Greenland's Thinning Ice - Melting at Glacier National Park - On Thin Ice - Paradise Lost - Water, Water Everywhere?
Amphibian Alarm About one third of the 6,000 amphibian species known to exist on Earth are threatened with extinction. What is the message these sensitive creatures are dying to send about the health of our planet?