Biggest global climate change demonstration in history

They are basically agreeing to climate change, human intervention etc. And saying in turn what is not settled is how exactly will the climate change in the future.

Umm, to the best of my knowledge that is like saying 'we would like to predict the future'. On top of that humans so far have a bad track record at predicting climate at all even a few weeks ahead.

So I feel like we should not even be asking this question. Instead we should focus on how the climate has been effected so far (hottest year in recorded history, drought in California, unreliable seasons for crops etc) and make changes because of that.

Assuming even if current state continues, we will soon run out of food and water.

Bummer