A discussion of the interactions between the four spheres of Earth and how they affect weather and climate. The slideshow is divided into two parts. The first deals with interactions between the atmosphere and the hydrosphere and the...

Examine these graphs from the NOVA/ FRONTLINE Web site to see dramatic increases in the temperature of Earth's surface and greenhouse gases in the atmosphere.

This lesson will discuss the importance of the biosphere (the global ecosystem) to living things. It is 2 of 3 in the series titled "The Biosphere."

Breathing Earth layers data about rates of carbon dioxide emission along with birth and death rates onto a map of the world in a real-time simulation of one of the principal greenhouse gases in the Earth's atmosphere, CO2.