Yeah for real! Thank you for mentioning Science and its attitude on Climate Change. I would never think that Climate Change is unprovable, but I have heard that it is difficult to prove (for Climate Change deniars) because of the research conducted on a local level rather than global (I believe this is the problem that I read with some of the research).
Also, some incredible minds, such as the mentioned Peter Singer are huge proponents of acting immediately on Climate Change. He’s read many essays on the topic that have been very influential. I personally have for a year now almost completely reduced my intake of beef, due to agricultural issues (conservative estimates suggesting that cows use up 60% of water, some statistics even suggest 98%). And I did try going vegan for 2 months. Was too irresponsible, but when I get a more stable schedule, it is something I wish to explore again very soon.