Warmist Gwynne Dyer: A number of times in the past, volcanoes have caused the Earth to "lurch suddenly into a climate 5-6 degrees C higher than now"

IPCC will show 'we are the volcanoes' - Winnipeg Free Press

Scientists are very cautious people. They won't go one millimetre beyond what the evidence makes indisputable, knowing that they will be attacked by rival scientists if they do. They are much more comfortable talking about probabilities rather than certainties. They are, in other words, a nightmare for journalists who have to transmit their findings to the world.

Of the nearly 100 scientists I have interviewed on climate change over the past five years, not one doubted that global warming is a big and frightening problem. Indeed, there was often an undercurrent of panic in their remarks. But when it comes to writing official reports, they retreat into science-speak.
...Earth has lurched suddenly into a climate 5-6 degrees C higher than now a number of times in the past. The original warming usually came from massive, long-lasting volcanic eruptions that put a large amount of CO2 into the atmosphere -- but in every case it was feedbacks like these that carried the planet up into a temperature regime where there was a massive dieback of animals and plants.

We are the volcanoes now.