Ecology
- What is ecology? [answer]
- How does a food chain work? [answer]
- What is a food web? [answer]
- What is a biome? [answer]
- Why is El Nino harmful? [answer]
- How does ozone benefit life on Earth? [answer]
- What is red tide and what causes it? [answer]
Environmental Degradation
- How rapidly is deforestation occurring? [answer]
- How many acres of tropical forest does the world lose annually? [answer]
- What products come from tropical forests? [answer]
- Who coined the term "Spaceship Earth"? [answer]
- How long will it be before all tropical forests have been destroyed, if present rates of destruction continue? [answer]
- What is the greenhouse effect? [answer]
- What are the components of smog? [answer]
- How do chlorofluorocarbons affect the Earth's ozone layer? [answer]
- What are flue gas "scrubbers"? [answer]
- What is acid rain? [answer]
- How acidic is acid rain? [answer]
- What are PCBs? [answer]
- What is eutrophication? [answer]
- Where are the radioactive waste disposal sites in the United States? [answer]
- How much oil is dumped into the seas? [answer]
- Where did the first major oil spill occur? [answer]
- Which pollutants lead to indoor air pollution? [answer]
- How much solid waste is generated annually in the United States? [answer]
- How much garbage does the average American generate? [answer]
- How much does packaging contribute to municipal solid waste? [answer]
- How critical is the problem of landfilling in the United States? [answer]
- What are Operation Ranch Hand and Agent Orange? [answer]
- What is the NIMBY syndrome? [answer]
- How much waste paper does a newspaper generate? [answer]
Endangered And Extinct Species
- Under what conditions is a species considered "endangered"? [answer]
- Which animal species have become extinct since the Endangered Species Act was passed in 1973? [answer]
- How many species of plants and animals are threatened in the United States? [answer]
- Are turtles endangered? [answer]
- What was the first animal on the U.S. endangered species list? [answer]
- What is the status of the African elephant? [answer]
- What is dolphin-safe tuna? [answer]
- How did the dodo become extinct? [answer]
- Why did dinosaurs become extinct? [answer]
- What were the smallest and largest dinosaurs? [answer]
- Did dinosaurs and humans live at the same time? [answer]
Conservation
- Who is considered the founder of modern conservation? [answer]
- What is a "green product"? [answer]
- Who started Earth Day? [answer]
- How much of the Earth is protected as national parks and similar sites? [answer]
- What was the United States' first national park? [answer]
- What natural resources are saved by recycling one ton of paper? [answer]
- What do the numbers inside the recycling symbol on plastic containers mean? [answer]
- How many trees are saved by recycling paper? [answer]
- What products are made from recycled plastic? [answer]
- What is the Pollutant Standard Index? [answer]
- What is the Toxic Release Inventory (TRI)? [answer]
- How many automobile tires are thrown away each year and what can be done with them? [answer]
- What causes the most forest fires in the western United States? [answer]
- When did the symbol of Smokey Bear begin to be used for forest fire prevention? [answer]
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