Climate change being man made is a scientific fact as in humans are driving the majority of warming since the industrial revolution by pumping increasing amounts of green house gases in the atmosphere. This warming is simple physics even if the effect on weather is complex. Venus is an example of run-way greenhouse warming.

A ten year old can debate what they want, opinions don't change scientific facts (burning fossil fuels puts greenhouse gases in the air which trap heat from the sun). Consensus meaning most most climatologists agree on what the data and models are telling them.

There are not two sides to the basic facts of the matter (complexities around which models are more accurate or what society should do is a separate matter).