The southern province was exposed to intensive grazing for many years , and now soil quality is poor and dust storms are present. The northern province has more fertile soil, more trees. Which province experiences more soil erosion?
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Answer: southern

Two brothers were born 20 years apart. Tom, the older brother, was 72, while Dan was 52 years-old. they got along pretty well. Which brother had a greater chance of developing cardiovascular diseases?
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Answer: Tom

Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens. Which group had some people that were exposed to certain medications?
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Answer:
Group Beta