The consequences of global warming and associated climate changes are now apparent. No longer can there be any doubt that anthropogenic (human-caused) warming of the Earth is happening, caused mainly by greenhouse gas emissions, primarily carbon dioxide, from burning fossil fuels. Climate change poses a grave threat to humankind. The world is already experiencing the consequences of global warming: more frequent and prolonged droughts, increasingly severe and more frequent storms, rising sea levels worldwide threatening coastal and vulnerable island populations, the melting of mountain glaciers and polar ice sheets, increased intensity of tropical cyclones and hurricanes, and more frequent and widespread fires. Without immediate action to curb greenhouse gas emissions, climate change can only get worse. In the period since the issue of global warming was brought to the attention of the general public in the late 1980s, both the legislative and the executive branches of the United States government have launched a number of initiatives to assess the threat and formulate policies to address it. Nevertheless, two decades later the United States government has failed to take effective measures to address climate change domestically or to assert international leadership on achieving meaningful carbon emission reductions. It is now well-documented that a shift in public opinion and failure of political will on climate change took place at the turn of the millennium, a change which can be largely attributed to a sophisticated, nationwide public relations campaign designed to conceal the dangers of burning fossil fuels from the American public by deceiving it as to the true state of climate science. Yet this deception is arguably punishable as criminal fraud under several United States statutes: first, as defrauding the public under the generic mail/wire fraud statute; and second, as defrauding the United States government under the "conspiracy to defraud the United States " statute. This Article examines whether it can be regarded as a crime based not just upon the unethical motives of its perpetrators, but on its effects: the catastrophic, global devastation which is the likely outcome of its success.