we actually do already know for sure except the original quote was in greek.
the information demonstrating that humans are not the cause of climate change is voluminous. here is a decent place to start: https://www.youtube.com/user/Suspicious0bservers/videos
there are links for each video. i started watching this over 5 years ago. i've done hundreds and maybe thousands of hours of research besides. i have come to love anything having to do with solar physics, it's fascinating.

there are many subjects that branch out from here, including the things that humans are actually doing to destroy our biosphere. if i can be of any help, let me know.

here is the story of my awakening from the CO2 deception: https://steemit.com/freedom/@lifeworship/one-day-i-was-finally-forced-to-wake-up-and-see-all-of-the-reality-i-had-denied