1. Which of the following gases is released by animals as a waste product of digestion that can contribute to global warming?
A. Methane
B. Nitrogen
C. Carbon Dioxide
D. Chlorofluorocarbon

2. Which of the following is NOT a greenhouse gas?
A. Methane
B. Chlorine
C. Nitrous Oxide
D. Carbon Dioxide

3. Which of the following activities contributes the most to carbon emissions globally?
A.Agriculture
B.Respirati
C. Deforestation
D.Burning fossil fuels

4. Which of the following may happen to planet Earth without the greenhouse effect?
A. It will die.
B. It will stay normal.
C. It will become warm.
D. It will become very cold.

5. In the past, refrigerators, aerosol spray, propellants and solvents were all sources of greenhouse gas. What do you call to these gases?
A. Methane
B. Nitrous Oxide
C. Carbon Dioxide
D. Chorofluorocarbons (CFC)

6. What do you call the certain gases in the atmosphere such as water vapour, carbon dioxide, methane and nitrous oxide which help maintain the Earth's temperature?
A. Solar gases
B. Ozone gases
C. Chorofluorocarbons (CFC)
D. Greenhouse gases​