[Q]: Keith is an environmental scientist. He was studying the loss of ozone layer and its effect on different species. His data showed that in the beginning or twentieth century there were hardly any loss of ozone layer. He categorized that time period as time A. Further inquiry revealed that things didn't go well at the end of twentieth century - when there were severe loss of ozone layer. He categorized that time as time B. Would level of UV radiation reaching the earth be higher or lower in time B than in time A?
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[A]: higher

[Q]: Beijing recently significantly increased the amount of cars on the roads there through mandatory price cuts for all motor vehicles. In Montreal, the number of cars on the roads has decreased drastically recently through public transportation initiatives and public advertising campaigns encouraging biking and walking. Which area will produce rain with higher pH?
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[A]: Montreal

[Q]: Mike is an an archeologist. He was pondering about how human legacy would be viewed in the future. For that, he was very interested in technofossils. He located a site with ample evidence of technofossils. He noted that site as site A. To compare site A with a site with no technofossils he located another site. He noted that site as site B. Would site A see less or more changes in biodiversity in the fossil record than site B?
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[A]: more

[Q]: Tom and Jim go running together once a week. This week Jim skipped his warm up before exercising, because he was a bit late. Tom warmed up properly before running. Which runner didn't do a slow increase in the intensity of a physical activity?
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[A]:
Jim