This guy is a kool-aid drinker of the first order. There is NO evidence that higher global temperatures will have negative health consequences - only speculation by those looking fora crisis.
And in any case, there is nothing mankind can do about global temperatures. The real threat is global cooling such as that seen in the last ice age. That will definitely have negative outcomes for mankind as people freeze to death and crops fail on a global scale.
Higher temperatures can create more food, therefore obesity.
/Grin