5. Which does not contribute to increasing amount of greenhouse gases in the atmosphere
A. Smokes from factories
C. Use of aerosols
B. Volcanic eruptions
D. Riding a bicycle
6. Which greenhouse gas is protected by decaying materials in landfills and coal mining?
A. Carbon Dioxide
C. Nitrous Oxide
B. Methane
D. Water Vapor
7. Which is a chemical compound that is used as oxidizer in rocketry and in motor racing
increase the power outputs of the engines?
A. Carbon Dioxide
C. Nitrous Oxide
B. Methan
D. Water Vapor​