a couple weeks ago Janet Yellen warned that net-zero carbon would cost about 2.5 trillion

that's cheaper than the pandemic. no reason it couldn't have been done already.

i no longer consider climate change a hard problem, the only hard problem is building political momentum without getting shot

I realize it can be fun to be snarky but consider the “business priority” portion you didn’t quote and the difference between “it’s too hard to do” and “doing it would cost X and impact performance of service Y by Z%”.