Note that large-scale vendors would indeed be open to adding a tweak or two if you order bulk but won't allow you to do your thing.
So I see the viable solution being to wait a few decades while continuing to observe the Earth's climate. If there is near future harm from global warming, we should see it by then.
Yes, and it will be too late to do something about it.
Life in the state of nature is solitary, poor, nasty, brutish, and short. - Thomas Hobbes, Leviathan