Essay on population growth past, present and future and the impact on society. Includes guiding questions for students and links to related resources.

In this interactive activity from NOVA Online, use the Fujita tornado intensity scale to assess the level of destruction left in the wake of actual tornadoes.

In this interactive quiz from NOVA, take the Environmental Challenge and test your knowledge of human impact on the world's natural resources and climate.

In this video from Wide Angle, the sparse life of the rural farmer in India is compared to the wealth of consumer goods available to wealthier city dwellers.

You won the lottery! The lottery officials have given you a choice. You can either receive the $10 million now in one lump sum, or you can receive $1 million a year for the next 20 years. Now what do you do?