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“Griffith calculates that, in order to keep the atmospheric concentration of CO 2 at no more than 450 ppm, humanity has to do something that is almost unimaginably difficult. We have to cut our fossil fuel use to around 3 terawatts, which means we have to produce all the rest of our power from non-fossil-fuel sources, and we have to do it in about twenty-five years or it will be too late to level off at 450 ppm.”

— Stewart Brand
Featured in: Stewart Brand Quotes
Stewart Brand Quote: “Griffith calculates that, in order to keep the atmospheric concentration of CO 2 at no more than 450 ppm, humanity has to do something that is almost unimaginably difficult. We have to cut our fossil fuel use to around 3 terawatts, which means we have to produce all the rest of our power from non-fossil-fuel sources, and we have to do it in about twenty-five years or it will be too late to level off at 450 ppm.”

“Griffith calculates that, in order to keep the atmospheric concentration of CO 2 at no more than 450 ppm, humanity has to do something that is almost unimaginably difficult. We have to cut our fossil fuel use to around 3 terawatts, which means we have to produce all the rest of our power from non-fossil-fuel sources, and we have to do it in about twenty-five years or it will be too late to level off at 450 ppm.”

— Stewart Brand

Stewart Brand Quote: “Griffith calculates that, in order to keep the atmospheric concentration of CO 2 at no more than 450 ppm, humanity has to do something that is almost unimaginably difficult. We have to cut our fossil fuel use to around 3 terawatts, which means we have to produce all the rest of our power from non-fossil-fuel sources, and we have to do it in about twenty-five years or it will be too late to level off at 450 ppm.”
Stewart Brand Quote: “Griffith calculates that, in order to keep the atmospheric concentration of CO 2 at no more than 450 ppm, humanity has to do something that is almost unimaginably difficult. We have to cut our fossil fuel use to around 3 terawatts, which means we have to produce all the rest of our power from non-fossil-fuel sources, and we have to do it in about twenty-five years or it will be too late to level off at 450 ppm.”
Stewart Brand Quote: “Griffith calculates that, in order to keep the atmospheric concentration of CO 2 at no more than 450 ppm, humanity has to do something that is almost unimaginably difficult. We have to cut our fossil fuel use to around 3 terawatts, which means we have to produce all the rest of our power from non-fossil-fuel sources, and we have to do it in about twenty-five years or it will be too late to level off at 450 ppm.”
Stewart Brand Quote: “Griffith calculates that, in order to keep the atmospheric concentration of CO 2 at no more than 450 ppm, humanity has to do something that is almost unimaginably difficult. We have to cut our fossil fuel use to around 3 terawatts, which means we have to produce all the rest of our power from non-fossil-fuel sources, and we have to do it in about twenty-five years or it will be too late to level off at 450 ppm.”
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