Here are the facts: The ONLY issue that is "debated" by climatologists is the range, scope, and severity of global climate change NOT whether it is happening or not, or how much of it is anthropogenic. The only ones that are doubting it is man made at all or that it is a hoax are not skeptics, they are CRANKS.
Quite literally, some of the same scientists that "proved" that cigarettes are healthy and nutritious are the same being paid by the oil industry to mislead the hysterical and ignorant.
Merchants of Doubt: How a Handful of Scientists Obscured the Truth on Issues from Tobacco Smoke to Global Warming
Climate Cover-Up: The Crusade to Deny Global Warming
The root core is that too many in the public are far too suceptible to "experts" who have lots of letters after their name. They will whip up hysteria of things that are not even a real threat, while misleading from issues that are pressing and urgent.
Doubt is Their Product: How Industry's Assault on Science Threatens Your Health