30 years later, deniers are still lying about Hansen's amazing global warming prediction | Dana Nuccitelli

Koch paychecks seem to be strong motivators to lie30 years ago, James Hansen testified to Congress about the dangers of human-caused climate change. In his testimony, Hansen showed the results of his 1988 study using a climate model to project future global warming under three possible scenarios, ranging from 'business as usual' heavy pollution in his Scenario A to 'draconian emissions cuts' in Scenario C, with a moderate Scenario B in between.Changes in the human effects that influence Earth's global energy imbalance (a.k.a. 'anthropogenic radiative forcings') have in reality been closest to Hansen's Scenario B, but about 20-30% weaker thanks to the success of the Montreal Protocol in phasing out chlorofluorocarbons (CFCs). Hansen's climate model projected that under Scenario B, global surface air temperatures would warm about 0.84°C between 1988 and 2017. But with a global energy imbalance 20-30% lower, it would have predicted a global surface warming closer to 0.6-0.7°C by this year. Continue reading...