Over the past 12,000 years, the greatest loss of biological wealth has resulted from the
A) conversion of natural ecosystems to modern agriculture.
B) movement of human products down rivers and across oceans.
C) extraction of oil and mineral from reserves buried deeply underground.
D) use of deep aquifers, lakes, and rivers as sources of freshwater.
Question 2
In much of India, children suffer from stunted growth, which is tied to a syndrome that includes
A) lack of food, internal parasites and lack of household fuel.
B) animal vectors of viral infection and industrial pollution of water supplies.
C) fecal contamination of water supplies, chronic gastric illness, and the inability to absorb nutrients from food.
D) lack of dietary fiber and protein and fear generated from constant earthquakes.
The continents were not always in their present positions. The position of the continents is importa
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