The Audacity of Occasionally Making Some Sense

Alright, now I'm totally confused. Just take a look at these two quotes. 1) "The forcings that drive long-term climate change are not known with an accuracy sufficient to define future climate changes." And 2) "we argue that rapid warming in recent decades has been driven mainly by non-CO2 greenhouse gasses such as chlorofluorocarbons, CH4, and N2O, NOT (my emphasis) by the products of fossil fuel burning." The first one is from 1998 and the second one from 2000. Any idea who might have uttered them, these quite reasonable sentiments? Try James Hansen!...Talk about a curve-ball, huh?