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350PPM . . . the most important number you need to know!
A Newsletter of the OMNI Center for Peace, Justice & Ecology's - Climate Change Task Force.
If humanity wishes to preserve a planet similar to that on which civilization developed, paleoclimate evidence and ongoing climate change suggest that CO2 will need to be reduced from its current 385 ppm to at most 350 ppm.DR. JAMES HANSEN
350PPM (parts per million concentration of carbon dioxide in the Earth's atmosphere) seeks to educate the public about the impending climate crisis. We must reduce greenhouse gas emissions and return the levels of CO2 in the atmosphere to no more than 350 parts per million. It is only at these levels or below that the climate and environmental systems of the earth as we know them can be maintained. As a point of reference it was 1988 when the earth’s atmosphere contained 350 PPM of CO2.
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