Greta Thunberg - Time Magazine Person if The Year, page-123

Why 100 authors? If I were wrong, then one would have been enough! - Albert Einstein

https://capacityofliberty.blogspot.com/2011/01/100-authors-against-einstein-scientific.html
Consensus is utterly irrelevant to science. The philosophy of science is devoid of consensus. What concerns science is not weight of numbers on the side of an argument, but what the facts are. What the evidence is.

Being in a minority dues not mean one is incorrect. Argumentum ad populum (or as used in this case, consensus gentium) is still a logical fallacy whether in the scientific community or within any other group (as is an appeal to authority, for those who keep going 'scientists say...').

But hey, since there's been 50 years of earth hour surely there is at least one prediction made that has come true?