Brad and Joe studied atmospheric conditions on different planets of our solar system. Joe studied about Earth, while Brad studied more about Venus. Which person learned less about sulfuric acid clouds?
Ans: Joe

Two earth-like planets orbited the same star. The inhabitants of Earth I released greenhouse gases into the atmosphere. Earth II, however, was much more conscious about the environment and protected it from anthropogenic changes. Which planet caused the release of less carbon dioxide into the atmosphere?
Ans: Earth II

Lawmakers were debating the pros and cons of Keystone XL Pipeline. One group of lawmakers proposed that the pipeline be constructed. They put their proposal in proposal A. The rival group of lawmakers proposed that the pipeline should not be build. They put their proposal in proposal B. Lawmakers would now have to choose one of the proposals. Which proposal would result in less pollutants, proposal A or proposal B?
Ans: proposal B

Indiana has decided it wants to do its best to stop contributing to global warming. The first place the government decides to look is at the number of factories that use fossil fuels in production. They plan to shut down many of them in the coming years. Given Indiana does indeed shut down many of its factories, will this result in a higher or lower contribution of carbon dioxide to the atmosphere?
Ans: lower