What Needs to be Changed?FAST
A new study show that by 2050, the United States must cut its emissions by at least 80% below those created in the year 2000 if the world is to avoid potentially dangerous impacts of human-induced climate change.
To avoid the most severe effects of climate change, the world must stabilize the concentration of heat trapping gases in the atmosphere at no more than 450 parts per million. This 450-parts-per-million limit aims to avoid a temperature increase exceeding 3.5 degrees Fahrenheit in a global average temperature above pre-industrial levels?a benchmark which geoscientist Katharine Hayhoe thinks could wreak increasing havoc on the environment as it is exceeded.
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