As Bill D indicates, the biofuels would be very destructive of the environment.
More and more oil reserves are found. The problem is that no practical way has yet been found to decrease emissions by harvesting them. May be impossible; not being an organic chemist I don't know.
Increasing nuclear power generation rapidly by building new plants would help with stationary power needs- thermal, solar and wind could help but only as supplements.
A mobile population needs power for vehicles, either mass transit or individual, and it is hard to visualize how massive reductions in greenhouse gases from vehicles can be achieved.

Hydrogen? It seems that there are problems with mass use that are difficult to surmount.