Wind Power Monthly
If we assume that the course of human civilisation will continue for at least another 1,000 years, then we will eventually arrive at a 100% renewable-energy future.
Whatever you believe about the existing reserves and undiscovered sources of fossil fuels and other combustible or radioactive minerals, they will eventually be exhausted or too expensive to extract.
Energy policymakers and planners act as if we had that kind of time. Unfortunately, we don't.