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

John studies how chemicals affect environment. He traveled to the Amish country to see their traditional ways of farming. He noticed they don't use any fertilizers or pesticides. He labeled this part of the study as case A. Then he visited a modern farming facility where they use tons of fertilizers and pesticides. He labeled this part of the study as case B. Which place would see less growth of algae, case A or case B?
Ans: case A

Two different countries have different approaches to milk production. Austria produced organic milk, while Hungary produced conventional milk. Which country reduced leaching of phosphates from farms?
Ans: Austria

Some students studied Earth's atmosphere in class. They also started studying Venus' atmosphere. They were fascinated by the subject and learned a lot. Which planet has an atmosphere that is not toxic to humans, Venus or Earth?
Ans: Earth