For those thinking we can get to a point where we no longer need fossil fuels:\nWe will always need lubrication for all types of machinery and motors regardless of how they are powered.\nIn order to be energy efficient it is necessary to lighten weight as much as possible within structural and safety parameters. Mining metals from the earth has it's own environmental issues. But lightening things means using plastics which are strong and durable yet light. Yes, they come from fossil fuels as well.\nI simply don't see a solution short of a miraculous source of energy such as fusion power coming from seawater. The planet cannot support anything like our current human population for an extended period of time. I'm glad I'm not young anymore.\n\n\nYou rise the thorny subject of the size of the human population and is certainly a part of any solution to solve the energy crisis. The Catholic Church forbidding use of contraceptives is causing great damage both to individuals (mostly women) and to the society and our planet.