Emerging markets are the car industry's big hope. But it won't be an easy ride...

Also in this special report:

Theme and variations - To succeed in emerging markets, rich country carmakers have to tailor their strategies.

The home team - Indigenous carmakers are working their way up. 

Pile them high - The cheap-and-cheerful end of the market.

Kings of the road - Cheaper than four wheels, better than two feet.

The art of the possible - The question is not whether the world can cope with three billion cars -but how.