100% Chance assuming that radicals like the AGW doomsday cult don't succeed in dramatically lowering peoples prosperity.
.
Hundreds of yeas of known fossil fuels.
Solar
Wind
hydroelectric
Geothermal
Nuclear
Fusion
Tide
waves
biofuels
methane deposits
hydrogen
All those are available with a few like hydrogen and fusion not quite ready. Which is used will depend on which is most expensive.