Petrochemicals and plastics are only a small fraction of oil demand. The vast majority is used as fuel. So no, we won't totally eliminate the need for oil for

Petrochemicals and plastics are only a small fraction of oil demand. The vast majority is used as fuel. So no, we won't totally eliminate the need for oil for a long time. We also won't totally run out of oil for a very, very long time. But we can eliminate the need for 50-75% of current oil demand in this century, possibly the first half of this century.