> What have we done to mitigate that risk
Climate change isn't a risk that needs mitigation, it is not a contingency of hypothetical events. It is happening right now, and lives are already being claimed.
Maybe you are shielded from that and want to keep your lifestyle rather than adapting.
> It is happening right now
We don’t actually know that.
We don’t have a second, identical Earth, where an industrial revolution powered by coal and oil and gas didn’t happen.