Opinions vary widely on the effect Man may be having on the climate. Some say it is mostly down to Man whereas others say the world has always gone through heating and cooling cycles.
I was interested in this NASA site as it is from the USA. Until very recently both the USA and China have denied that our climate is changing. Of late, both seem more disposed to look at the evidence.
There is little doubt in my mind that it is up to Man to help keep the rise in global temperatures within safe limits. Whether or not Man is to blame we can argue later. The world needs a co-ordinated effort. It can be done.