I have started two games on random terrain settings and both times have been placed into continents covered with jungles. It seems like it takes forever to clear out a little land around each city.... Playing on the chieftain level, I have fallen behind the other civs and have played catch-up. In last game, it took 24 turns for a worker to clear a jungle square; 9 turns to build a road through a square. Has anyone found a good strategy for taming the jungle quickly?