Life has existed for billions of years. Not all of it was 'over' consuming or else none would have survived to this day. There is no guarantee the sun can prov

Life has existed for billions of years. Not all of it was 'over' consuming or else none would have survived to this day. There is no guarantee the sun can provide as much energy as we're consuming on an ongoing basis. That's because oil and other minerals built up over hundreds of millions of years. We're on track to consume all that's within reach in a few centuries.