- 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?
Signs of Warming In the 1800s, the Swedish chemist Arrhenius first suggested that Earth was experiencing a "greenhouse effect." We compare the effect on Earth and its twin, the planet Venus. We also look at how burning fossil fuels is changing Earth's environment.
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