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'Scary' climate message from past http://apocadocs.com/s.pl?1255185599
A new historical record of carbon dioxide levels suggests current political targets on climate may be "playing with fire", scientists say.
Researchers used ocean sediments to plot CO2 levels back 20 million years.
Levels similar to those now commonly regarded as adequate to tackle climate change were associated with sea levels 25-40m (80-130 ft) higher than today.... In the intervening millennia, CO2 concentrations have been much lower; in the last few million years they cycled between 180ppm and 280ppm in rhythm with the sequence of ice ages and warmer interglacial periods.
Now, humanity's emissions of greenhouse gases are pushing towards the 400ppm range, which will very likely be reached within a decade.... "This is yet another paper that makes the future look more scary than previously thought by many," said the University of Arizona scientist.
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[Read more stories about:
holyshit, carbon emissions, carbon sequestration, arctic meltdown, death spiral]
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