An engaging and informative interactive tool that allows students to explore many connected factors in air, land, and oceans systems. There are links to videos, visulas, other web resources, and descriptive information. Concept maps are included for each factor. This is rich and engaging.
Global Climate Change: NASA's Eyes on the Earth. Current news and data streams about global warming and climate change from NASA's Jet Propulsion Laboratory.
Human Footprint reveals the lifetime consumption of an average American including the resources needed to produce, package and transport everything consumed.