A 95-page learning module that integrates biology, chemistry, and engineering. It includes in-class labs, virtual labs, and engineering design activities. Working with algae, students learn about and investigate how photosynthesis,...

Excellent site covers all types of water pollution. Hundreds of links including books, articles, organizations, specific topics.

This site contains great information about a number of household hazardous wastes and suggested methods of disposal.

Easter Island's famous carvings, called moai, bear silent witness to the collapse of the Polynesian culture that once thrived there. View these massive artworks and read about the deforestation of the island. An excellent site for...