Which statement best represents the views of a mainstream economist from a technologically advanced country?
A. The Earth can support a world population of 30 billion people without serious environmental harm.
B. The Earth can support a world population of 300 billion people without serious environmental harm.
C. The Earth can support a world population of 30 billion people but with serious environmental harm.
D. If the population of the earth exceeds 7 billion, we will experience a major human dieback.
Answer: A
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