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There's no denying that oil, coal and gas are tremendously useful. The problems aren't the resources but our profligate use of them. Using them more wisely is a start. In many cases, we also have alternatives. Most plastics are also made from oil -- which presents another set of problems.
As well as being a faulty assertion, pointing out the many uses for fossil fuels in an attempt to reject the need to reduce reliance on them is actually an argument in favour of burning less coal, gas and oil. Fossil fuels are useful for many purposes, so why extract, transport and burn them so rapidly and wastefully?