I think to deny there are climate changes causing global issues is silly. What causes them is the actual debate.
Draught, desertification, lack of water, ocean and atmosphere changes to temperature are all objectively proven facts.
The connection between lack of water, desertification, mass migration and political instability is fact.
The growth of human population to unsustainable levels in India, China and other nations is fact.
Why debate the cause of it when the symptoms of it are right in your face and need to be dealt with?
If your prostate leaks why deny it?. Either buy diapers or walk around with pee in your pants.