As scientists can best figure, the target requires that - TopicsExpress



          

As scientists can best figure, the target requires that atmospheric concentrations of carbon dioxide, the main greenhouse gas, stay below 500 parts per million. The level recently surpassed 400, and at present growth rates will surpass 500 within a few decades. If countries permit continued high emissions growth until 2030, the draft report found, the target will most likely be impossible to meet, at least without a hugely expensive crash program to rebuild the energy system, and even that might not work.
Posted on: Thu, 23 Jan 2014 14:00:00 +0000

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