Lots. We are just now beginning to unlock vast fields. The USA alone has 200 years worth of domestic supply (cite: parent's economist link, not sure if it inclu

Lots. We are just now beginning to unlock vast fields. The USA alone has 200 years worth of domestic supply (cite: parent's economist link, not sure if it includes consumption growth). The good news is that hydrocarbons cannot get much shorter without turning into hydrogen. At some point solar will be too cheap to use anything else. Gas is thus an economical holdout until then so we can avoid a Malthusian future.