ad hominem
means your counter-argument is weak to non-existent. Besides he's not so much a climate change sceptic, just not a believer in the disaster scenarios touted as fact.
Space/Science » in reply to He's a mammal!
means your counter-argument is weak to non-existent. Besides he's not so much a climate change sceptic, just not a believer in the disaster scenarios touted as fact.