Well you dramatically failed this accepted challenge.

The author stated up front he agreed that climate change was real, and was bad. He just said that scientists dont claim damages greater than cost of switching.

You just references some stuff that shows there is SOME effect, but do not quantify scale of effect.

You did make a collossal claim, that a BILLION people will die from starvation in the next 2-6 years. but Uh, you provided no reference for that particlar scientific "fact"

YOU, are the reason this author needed to write this piece! Please provide references that show magnitude of costs.