A GE project the Greens should support

Genetically modifying crops to make petrol

While it's not a solution to our dependance on finite fossil fuels (short version: not enough land area), it's still a good idea. And the CO2 released when the fuel is burned comes from the atmosphere in the first place, so it's greenhouse-neutral into the bargain.

And OTOH we already have the technology to ferment crops into alcohol to run cars; it's a substantial contributer to Brazil's fuel supply. The problem is not lack of technology, but that it is (as yet) uneconomic to adopt it.