[Fatalis]

As far as the scientific study of current climate goes, that's essentially been proven.

Nonsense. Where's the baseline?

[cogitator]

Nonsense. Where's the baseline?

Surface observations indicate that the planet warmed about 0.6 C in the 20th century, 0.8 C since 1850, and about 0.4 C since 1980. The fairly-rapid warming since 1980 has been cited in numerous scientific studies as being at least partially caused by human (anthropogenic) factors, of which the most significant is greenhouse gas emissions from energy production.