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During the last century humanity acquired the ability to destroy itself. The direct approach to destruction can be seen in such facts as the ever-present threat of nuclear war, but we have also developed the capacity to do indirect harm by altering conditions necessary for survival, including the looming cloud of climate change.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.