I do not deny that (some) pollutants accumulate. I also do not deny that pollution is quite bad in some places.
I am specifically questioning your claim that doubling pollution would specifically halve the rate of innovation. I was pointing out that you have not supported that statement. You claimed it twice, you still haven't supported it, and I'm pretty sure that you can't support it.
Stop trying to read into my statement wild claims that aren't there. Can you support your claim?