The Worst Case Scenario

In an opinion piece published in the April 30, 2009 issue of Nature, the writer
discusses what a world with 1,000 ppm of CO2 in its atmosphere might look like. In this scenario, many rare systems would probably be lost, including Arctic sea ice, mountain-top glaciers, most threatened and endangered species, coral-reef communities, and high-latitude indigenous human cultures. Asian mega-delta cities would experience increase of sea levels and rapidly intensifying tropical cyclones. Infrastructures could be damaged or lost; heat waves and food shortages could happen. Current literature suggests that the outcome of a 1,000 ppm scenario would almost universally be negative and could cause a substantial loss of gross domestic product.

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