The old climate change, page-9

In ancient times and there on into the future there must have been extreme climate change caused by cave men cooking on open fires and heating caves with fire which caused carbon into the atmosphere. Then up to recent times people still used fire to cook and for warmth.
But now instead of carbon from open fires we have carbon caused by oil and gas energy.
So why are we alarmed by extreme weather but not by those that lived in the past. They just called it a change in the weather.