[Q]: Iran an Iraq are 2 neighbors. Iraq produces its electricity by burning fossil fuels, while Iran uses nuclear fission as its energy source. Which country causes less acid rain?
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[A]: Iran

[Q]: Two researches studied the Earth's mantle. Clint studied mantle melting, and his pal Uri decided to study other mantle related phenomena. Which researcher read more about sediments lying on top of the subducting plate?
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[A]: Clint

[Q]: Greg and Paul were two neighbors. They were both into mycology. Greg researched AM fungi, while Paul studied other types of mycorrhizal fungi. Which researcher learned less about AM fungi reallocating their resources to intraradical hyphae?
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[A]: Paul

[Q]: Sarah and Sophie are sisters living in two different cities. Sarah lives in a very rural area with hardly any air pollution. Sophie lives in a heavily industrialized urban area with many factories and people driving cars to their destinations. This all leads to Sophie's city having a large amount of pollution going into the atmosphere. Does Sophie's city do more or less harm to the environment than Sarah's?
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[A]:
more