3. Which of the following is not a renewable energy source?
(A)biomass
(B)natural gas
(C)solar
(D)wind

4. Which of the following is a greenhouse gas? (A)helium (B)nitrogen (C)methane (D)oxygen

5. The enhanced greenhouse effect is due to (A)increased trapping of infrared radiation emitted from the Earth's surface and oceans. (B)decreased trapping of infrared radiation emitted from the Earth's surface and oceans. (C)increased trapping of visible and ultraviolet radiation emitted from the Earth's surface and oceans. (D)decreased trapping of visible and ultraviolet radiation emitted from the Earth's surface and oceans.

6. The mass of carbon dioxide in gigatonnes emitted into the atmosphere globally in the year 2000 was approximately (A)2 (B)8 (C)15 (D)30

7. The projected percentage increase in atmospheric carbon dioxide between the years 2000 and 2100 is approximately (A)60 (B)100 (C)200 (D)550

8. What percentage of the energy in coal in the ground reaches the home? (A)10 (B)25 (C)90 (D)213

9. How much energy is not converted to electricity when one kilogram of coal is burnt in a power station? (A)800 kJ (B)2100 kJ (C)4200 kJ (D)5580 kJ

10. The amount of dioxin required to kill an animal depends on its body weight. If 50% of dogs die when they consume a dose of 1.5 mg/kg, what dose would be expected to kill 50% of dogs that weigh 15 kg? (A)0.1 mg (B)1.5 mg (C)7.5 mg (D)22.5 mg

11. A factory uses recycled paper to produce pulp that is then used to make paper. If 75% of the recycled paper is converted into pulp, how much recycled paper is required to produce 1 tonne of pulp? (A)0.25 tonnes (B)0.75 tonnes (C)1.33 tonnes (D)1.50 tonnes

12. Which is the most advanced approach? (A)recycling materials (B)using biodegradable material (C)reducing the amount of materials used (D)creating more durable products

13. Obstacles to recycling include (A)lack of inclusion of environmental costs in market prices (B)tax breaks for mining virgin materials (C)lack of large, steady markets for recycled materials (D)all of these answers

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