[danjoc]

Logically speaking, this is incorrect. Both could be true given a circumstance, like say, the sun goes red giant in the later case.

Furthermore, "the reason" can usually be whatever you want it to be if you go far enough back in the chain of causations. My hands were wet this morning when I dropped the jelly jar. But that wasn't my fault, it was the water company's fault for supplying the wetness on my hands. Or perhaps it was the Roman's fault for kickstarting the whole thing with aqueducts. But that's really just mankind's fault for existing, so human activity is at fault for my loose grip on the jelly jar today.

Overall, I found this article interesting, and frankly: Go mankind! We averted an ice age and certain death/destruction with farming. If we want to talk about problematic climate change, look at how living on top of a mile of ice works out for our species.