Sure its not gonna "kill the world", but you can expect a constant inflation of food prices, wars plus tens of millions of refugees due to climate instabilities

Sure its not gonna "kill the world", but you can expect a constant inflation of food prices, wars plus tens of millions of refugees due to climate instabilities. It will not eradicate mankind, but it may provoke the downfall of modern civilizations. And then good luck starting from the beginning again after you have depleted all easily accessible basic ressources such as iron or coal.