Understand how human activities may be altering the Earth's atmosphere. Survey the potential impacts of climate change. El Nino Trace the events that disrupt normal patterns in the Pacific Ocean. See how El Nino profoundly effects marine life and humans. Check out what scientists are doing to understand and predict El Nino events.
Ozone Hole Learn how ozone shields Earth from harmful solar energy.
Understand how man-made chemicals are eating away at the ozone shield. See the consequences of ozone destruction. Vital Signs Explore an interactive world map that looks at global change. Observe dramatic Space Shuttle photos of natural and human impacts. See acid rain, deforestation, severe storms, and more.