That's not true, they are talking about different scenarios. They are not saying we are going extinct for sure. Of course if you consider a scenario of +6° we

That's not true, they are talking about different scenarios. They are not saying we are going extinct for sure. Of course if you consider a scenario of +6° we are talking about billions of deaths. The problem here is the food crisis which will come and its consequences. And, by the way, the scientist is an ipcc reviewer which is the principal authority about climate change and part of ONU.