‘Welcome back, @VP’: Joe Biden says GOP skeptics of AGW ‘also deny gravity’

He’s an expert on everything, and you’re dumb: Biden claims those skeptical of AGW also deny gravity. I’d challenge him to find anybody who denies gravity, yet many, many credible thinkers, even scientists, question AGW.  It is common of those on the Left and the Green movement (that’s probably redundant) to employ Saul Alinsky’s tactic of ridiculing your opponent, rather than engaging in honest debate.