K20 Learn
Filling Our Land with Landfills: Solid Waste Disposal
Though it comprises only 5 percent of the world's population, the US generates 40 percent of the world's waste. Scholars learn about landfills, their safety, and other solid waste methods. They use experiments and research to learn more....
College Board
2008 AP® Environmental Science Free-Response Questions
Some of the oiliest creatures on earth may be the answer to our energy crisis! Using a four-question assessment, resource scholars consider the use of microalgae as fuel among other environmental science topics. Each question has several...
Captain Planet Foundation
Worm Your Way Out of This
How can you provide healthy soil for your garden? Study worms, bacteria, and other microorganisms in a lesson about decomposition and organic compost. After discussing what you know about worms and watching a video, watch what worms do...