Piers Corbyn — English Scientist born on March 10, 1947,

Piers Richard Corbyn is the owner of the business WeatherAction which makes weather forecasts. It claims to make accurate forecasts up to a year in advance. He is the brother of Jeremy Corbyn... (wikipedia)

The weather records of the U.S.A. are the best kept and most accessible in the world, thanks to consistent government/military taxpayer support. There are longer European data sets, but the U.S.A. data is enough to forecast major extreme events.
Polar bears did very well in the warmer times. They didn't die out at all; they didn't die out in the last 10,000 years, nor during the previous interglacial, nor the one before that. So, they're just used as a deceitful heartthrob; you know, to pluck your heartstrings because the polar bears might die out.
It's not the case that carbon dioxide drives temperatures. When you leave Ice Ages, it's the other way around: The temperatures go up first, and then carbon dioxide levels go up.
Computer modelling for weather forecasting, and indeed for climate forecasting, has reached its limits.
The general trend in the last 4,000 years is that carbon dioxide and temperature have been moving against each other.