also, see if you can stave off the worlds dependence on oil - you do that by getting cars to run on electricity, switching to biofuels and also reducing the industries dependency on coal. There's a tech that makes synthetic oil, but that's difficult to reach in time..
Generally you need to check the stats and info on each continent often, to see how your policies are affecting them - the oil crisis comes soon and hard if you develop China, India and the 3rd world too fast.