Students investigate the differences between weather in the past and in today's world.  In this climate change instructional activity, students review what they currently know about global warming, then discuss ways climate change...

An article about what China is doing to turn around its pollution problems. Read about plans for establishing large eco-communities in China, which are intended to make China's air and water cleaner as they also absorb millions of...

This site reviews the effects of agricultural development, urban and industrial development, drainage of the land surface, modifications to river valleys, and modifications to the atmosphere have on ground water and surface water.