by Graeme » Sat 05 Jan 2013, 18:52:28
Climate change won't wait
$this->bbcode_second_pass_quote('', 'S')ocietal change usually happens slowly, even once it's clear there's a problem. That's because, in a country as big as the United States, public opinion moves in leisurely currents. Change often requires going up against powerful, established interests, and it can take decades for those currents to erode the foundations of our special-interest fortresses. Think civil rights, gay marriage, equal rights for women.
With climate change, however, there simply isn't time to waste. It's not a fight, like gay marriage, between conflicting groups with conflicting opinions. It's a fight between human beings and physics. And physics is entirely uninterested in human timetables. Physics couldn't care less if precipitous action raises gas prices or damages the coal industry in swing states. It couldn't care less whether putting a price on carbon slowed the pace of development in China or made agribusiness less profitable.
Those of us in the growing grass-roots climate movement are moving as fast and hard as we know how (though not, I fear, as fast as physics demands). Thousands of us will descend on Washington on Presidents Day weekend [16-17th February] for the largest environmental demonstration in years. And young people from 190 nations will gather in Istanbul, Turkey, in June in an effort to shame the United Nations into action.
We also need you. Maybe if we move fast enough, even this all-too-patient president will get caught up in the draft. But we're not waiting for him. We can't.
latimesBill McKibben is a professor at Middlebury College and founder of the global climate campaign 350.org. A longer version of this piece appears at tomdispatch.com.Global Heating Revisited$this->bbcode_second_pass_quote('', 'W')e have zero years to solve our addiction to hydrocarbon energy.
How many times have we heard: We have a decade, or we have three years, or we until 2020? In the 1980s, ecologists used to say, “We have to solve this by 2000”, which is now a decade behind us. We don’t have 10 years or 3 years, or any years. We are already far behind any sort of timeline that might have kept Earth’s temperature from rising +2°C from the pre-industrial era. We are now gambling our progeny’s future with runaway heating that could ravage human agriculture, devastate the remaining forests, increase extinctions, and flood every coastal city on Earth.
A comprehensive study of future temperature increase, the MIT Integrated Global Systems Model (A.P. Sokolov, P.H. Stone, et. al., American Meteorological Society's Journal of Climate, 2009) doubled the earlier 2003 estimates.
The MIT group ran 400 variations of the model, changing certain input parameters, including variations in physical conditions, human activity, economic policy, and so forth. The projections indicate a median probability by 2100 of CO2 concentration reaching 550 ppm and a median probability of Earth heating by 5.2 degrees Celsius (°C), with a 90% probability range of 3.5 to 7.4 °C, compared to the 2003 estimates of 2.4°C.
The lower bound, or minimum projected heating, is now + 2.4°C by 2100, with a “very small probability” it will be this low, and only with drastic, immediate, global policy changes that reduce our reliance on oil and gas.
The ecology movement may have one last chance, but the stakes are now much higher, and our actions – to succeed – will have to be similarly more rigorous.