I can appreciate the attitude that the "jury is still out" on the question of climate change,
The jury isn't "still out" on climate change. The climate of the Earth is in a constant state of change. That is probably the only thing all the scientists actually agree on. The dispute revolves around whether or not humans are the proximate cause of climate change. Logically, I don't know how anyone can say that we are because we have 4 billion years of climate history and humans have only been around for a miniscule part of that time and yet the climate was constantly changing.
Humans are certainly responsible for all the pollution we see. Once we recognized the damage we were doing to our immediate environment, we started correcting our ways. It's been a long journey and we've had a lot of successes. For example, the sky over Los Angles isn't a constant sickly shade of green, you can swim in the Hudson these days, and the Monongahela isn't in danger of catching fire again any time soon, but there are still parts of the world where people don't have clean drinking water and have much shorter lifespans due to environmental pollution. I think China is building dozens of new coal plants every year. The pollution in large Chinese cities is so bad that their residents wear masks when they go outside. I think the Chinese know enough to clean up their act and yet they don't and no one seems to have the cojones to call them out on it except Trump.