I have no more or less brain cells than the next person, but have been stabbing at meteorology for the past few decades.
IPCC is an internationally constituted group of scientists.
Everyone is entitled to an opinion considering the future of the planet is at stake.
My opinion is we had better to be careful in our decisions as humans.
I also don't think that some controls on what we call pollution are necessary. After all, on the scale of global time we are merely the thinnest outer layer.