Hat tip to Chris S on the last AWOGWN thread for posting the link, here is the video of David Mitchell shredding the "prove it first, then we'll stop the pollution" argument embedded below:
I have argued many times that the "let's do nothing til we're sure" people have it backwards because we are in fact doing something: altering the atmospheric chemistry. Do nothing til we're sure would entail an immediate cesation of all long-lived GHG emissions.
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