"Climate change poses a direct threat to the infrastructure of America that we need to stay competitive in this 21st-century economy."

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Our early 21st century civilization is in trouble. We need not go beyond the world food economy to see this. Over the last few decades we have created a food production bubble-one based on environmental trends that cannot be sustained, including overpumping aquifers, overplowing land, and overloading the atmosphere with carbon dioxide.

— Lester R. Brown