Getting enough coal mined and transported to the coast (either by rail, boat, truck or power line) is far more challenging and expensive than most outside observers realize. (dotearth.blogs.nytimes.com)
On the other hand, fossil fuel companies are sitting on enough coal, natural gas and oil reserves that, when burned, will undoubtedly push us past the 450 ppm mark. (gracelinks.org)
Coal is abundant; assuming current rates of usage and production do not change, estimates of reserves indicate that enough coal remains to last more than 200 years. (britannica.com)