'Don't let anyone tell you we know enough. Always question the science, be skeptical, & check everything that I claim.' -- 'He bristled at notion of politicians rescuing the planet & detested the politicization of climate science, refusing to participate in political debates, saying: 'I don't know the first thing about rescuing the planet. For that I am not an expert.' -- 'His critical view often contradicted modern opinion on env. topics'