Chevron should be just fine in a decade, thanks largely to the continued demand for oil and natural gas.Chevron (CVX 1.65%) has basically decided to stick pretty close to its core, continuing to produce oil and natural gas instead of shifting toward cleaner alternatives as some European energy giants have done. Some investors might view that as a mistake, given the ongoing growth of renewable power. The fear is that oil and natural gas will eventually become obsolete. History suggests that's not likely to h ...