Hard to believe that climate scientists once recommended melting the arctic ice cap on purpose – a mere 13 years before Hansen testified before congress [1988] that the planet was facing a heat death due to CO2. From Newsweek on April 28, 1975:

"Climatologists are pessimistic that political leaders will take any positive action to compensate for the climatic change, or even to allay its effects. They concede that some of the more spectacular solutions proposed, such as melting the arctic ice cap by covering it with black soot or diverting arctic rivers, might create problems far greater than those they solve."

http://reasonabledoubtclimate.files.wordpress.com/2011/08/newsweek_coolingworld.pdf