Multiple choice. Choice and write only the letter of the best answer.

1. Which of the following are the main fossil fuels?
a. Coal, Oil, and Gasoline
b. Coal, Water energy, Crude oil
c. Coal, Oil and Natural Gas
d. Coal, Wind energy, Renewable resources

2. Which of the following statement is correct?
a. Renewable energy is cannot be replaced
b. Fossil fuel is limited
c. Renewable energy is never run out
d. Fossil fuel is man-made

3. Based on the figure above, What is the main source of electricity in the U.S.?
a. Natural gas
b. Coal
c. Fossil Fuel
d. Non-fossil fuel

4. Which of the following gases contributed greatly in the increase of greenhouse gases?
a. Carbon Dioxide
b. Methane
c. Sulfur dioxide
d. all of the choices

5. Based on the figure above, what is the least contributor of carbon dioxide emission?
a. Coal
b. Natural gas
d. All of the choices
c. Oil​