“But this is the stuff that worries me most. We don’t know what we’re doing, not trying to stop it, [and] with big consequences we don’t really understand.”
Breaking it down,
"We don’t know what we’re doing,… " The problem is, we kind of do know what we’re doing and it isn’t pretty at all. Certain Siberian islands are on high alert because massive numbers of polar bears have invaded the islands and they’re all quite hungry. So, what happens to humanity when we see repeated failures of the world’s wheat, corn and rice harvests?
“…not trying to stop it, …” It matters who, precisely, isn’t trying to stop it. Most of our often corrupted elected officials, absolutely! The scientist uttering this pronouncement, well, he spends so many hours a week on the climate project. He has a hard-driving job to maintain and maybe kids to raise and all that, but at least he’s rather aware of the problem.
“with big consequences we don’t really understand.” We’ll try.