Read here. Many accuse the CO2-AGW skeptics of being anti-science, yet in the real world, it is the skeptics who embrace science with gusto and won't let go of it. The actual physical science of CO2 emissions, atmospheric CO2 levels, and subsequent influence on temperatures is very well known. To reduce it down to its simplest components, to keep global temperatures from rising a single degree Celsius means that 1.767 trillion tons of future CO2 emissions must be prevented (human CO2 mitigation) - that's the actual hard science.
The entire world of human activities produced only 32 billion tons of CO2 emissions in 2008. In order to eliminate 1.767 trillion tons of human CO2 emissions, which would prevent a 1 degree Celsius increase, the world (all of humanity) has to eliminate 100% of all CO2 emissions for 55+ years, based on 2008 figure of 32 billion tons. Yes, over 55 years of zero economic/industrial/government activity, to accomplish zero CO2 emissions, just to prevent a 1 degree increase, starting immediately.
The science is the science and there is no escaping the hard, scientific facts. There is no way to politically or economically to shut down the world's economic system for decades, let alone a couple of days, to meet an impossible, extremely dubious climate objective.
Or, in different words, CO2 mitigation will be unable to deliver practical, significant prevention of future temperature increases.
For the world's citizens, Copenhagen's sole focus on CO2 mitigation ('decarbonization') has been an exercise in galactic futility, and ostentatious waste, conducted by the hubris-challenged political elites and celebrity class, who are the antithesis of science, if not its most fervent enemies.