To me, on Emperor, I think you're in excellent shape. Midgame is won or lost with coal. With all that jungle, you're almost certain for coal, as others have pointed out. Rubber too. I mean, I go straight to Industrializaton to locate coal, and if I don't have it, I immediately go to war to get it. Coal is worth fighting for.
Plus, you don't typically attack jungle with only 1 worker. You cut jungle in gangs. The trick is to build your early cities on the fringe of jungle and good terrain, with the city being built on jungle to "clear" one tile with the city itself. Get some workers going as time passes, and then attack the jungle.
While jungle is a pain to cut, it certainly bears great fruit in the midgame when its cut down because jungle cities -- now grassland cities -- can turn into monster producers.
Frankly, I like to start where jungle is close by because I look at jungle as a net positive in the long run.
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