Not always - there have been 5 mass extinction events on earth. 250 million years ago 96% of species died due to runaway greenhouse gases from volcanic eruption

Not always - there have been 5 mass extinction events on earth. 250 million years ago 96% of species died due to runaway greenhouse gases from volcanic eruptions in siberia. A positive feedback mechanism kicked in. Eventually negative feedback stabilized the earth - but in a new climactic equilibrium. Reference. https://cosmosmagazine.com/palaeontology/big-five-extinctions https://cosmosmagazine.com/palaeontology/big-five-extinction...