If we are to believe what we've been told by climatologists and the government we should believe that the reason we need to replace oil as our primary energy source is global warming. But, we know that some researchers have lied about their findings. Just recently a big climate research outfit was found burying data about solar output. We know there are political ulterior motives at play with climate change.
But maybe we need some facts. First, solar output went up quite a bit during the 20th century and is believed to be responsible for 25% of the rise in global temperatures. Also, note that solar output has been at an all time maximum since the early 1960's, but has been constant since then. Global average temp has risen a mere 1.1 degrees in the last century. That doesn't sound like much. There is an ongoing dye off of species in the oceans, leading many remaining species like Killer Whales to change their eating habits and migrate north.
But I propose that there is another reason why we need to stop using oil. It is global cooling. Global cooling is a far greater threat than global warming. It is believed that most of the ice ages in history were caused by a drop in solar output, which happens in cycles. And since the Sun has been pegged high for decades that can mean pretty much one thing. It is going to start dropping.
If we use up all the oil now, which we know is the biggest contributor to greenhouse gases then we won't have any left when we really need it in the future, when temperatures are plummeting. We won't be able to stop the next ice age but we might be able to slow it down long enough for us to prepare for the inevitable, an ice age that may last 100,000 years.
The good news is that astronomers have found vast regions of space containing hydrocarbons. Hmm, interesting since oil is supposedly from fossils. But we might be able to collect some of those nasty hydrocarbons in the future should we need them. But it still makes sense to save what oil we can right here at home.
Another potential use for oil in the future might be to terraform Mars.