Ben and Harry were studying about the climatic history of Earth. Ben was more attracted to learning about early Ice Ages, while Harry was curious about the Earth atmosphere and read about ozone depletion and its consequences. Which person learned less about the danger of CFCs?
----
Answer: Ben

Two neighboring planets identical to Earth in size and atmospheric conditions behaved differently towards their environments. Planet A emitted a lot of air pollution, destroying its ozone layer, while Planet B respected the environment and used ecological products. Which planet used fewer bromine gasses?
----
Answer: Planet B

Peet farm was supplying a nearby city with organic milk. Toad farm was a competitor on the same market, but they didn't produce organic milk, they used conventional agricultural methods. Which farm leached more nitrates (NO3)?
----
Answer:
Toad