The overall temperature of the earth cannot be measured with enough accuracy to determine whether it is actually warmer or cooler than it was 30 years ago.
One of my main arguments against global warming theory. And then they try to tell us they know what the average temperature was 100,000 years ago.
All of the ring leaders in the global warming alarmist camp are first and foremost political activists. This is a massive play for money and power with a bunch of useful idiots tagging along for the ride. Anything resembling actual science turned against them two or three decades ago.