2. Non- Renewable resources can

• take well over 100 years to be replenished ( limited supply) .
• be replenished within 100 years and used over and over again.

3. Pollutants are

• chemicals that harm the air
• chemicals that harm water and land
• all of the above

4. fuels ( like coal, oil and natural gas) formed from the remains of dead plants and animals buried deep underground

• fossil fuels
• natural resources
• landfill

5. a system of trash and garbage disposal in which waste is buried between layers of earth

• fossil fuels
• natural resources
• landfill

6. Materials, such as minerals or water that are naturally occurring on Earth

• fossil fuels
• natural resources
• landfill

7. Water is an inexhaustible resource because it _________________.

• can be used up
• can be polluted
• can renew itself through the water cycle

8. What are the TWO main causes of air pollution?

• cars and factories
• littering and cars
• dumping of waste and chemicals into our water sources

9. Using less electricity helps prevent pollution because ________________.

• electricity produces harmful chemicals
• it allows power plants to burn less fossil fuels
• dumping of waste and chemicals into our water sources

10. The best way to solve the problem of pollution is _____________________.

• to prevent it in the first place
• organizing neighborhood clean-ups
• government clean-up programs

11. When gases released by burning oil and coal mix with water vapor in the air, they form _________________.

• air pollution
• land pollution
• acid rain