Are you seriously saying you don't understand the potential consequences of a signficant change in the climate?
Droughts, extreme weather, uncertain growing seasons, floods, just to start with.
We know the earth's climate has changed substantially many times in the past. It is pure folly (and a bit arrogant too) to think we have any meaningful control over it and that we can prevent these changes from happening again.
There's another "green house" gas that traps far more heat than CO2. There is also far, far more of it...
It's called water vapor.
Though rarely mentioned...
We'll simply have to adapt. And ultimately we need to get off this rock.
Are you saying you don't understand a changing environment and evolutionary changes thereof?