Okay, I'm watching a video of a professor dismissing the extent of climate change (it's for school). Basically, he says something like that : "Carbon emissions are overestimated, maybe of a half. SO we've still got 50years, a lot of time and we don't need to rush."
Well, he's saying that current estimations are false, and just say "I guess they may be 50% of what we currently think". If he knows current figures are imprecise, why doesn't he give more precise ones ? And btw, it's already been 50 years since the first measures to tackle climate change have been taken, and the general situation is not good-looking.