That's because those the countries importing them make that proposition economical. For the Chinese, producing a car is like producing a hammer: only the produ

That's because those the countries importing them make that proposition economical. For the Chinese, producing a car is like producing a hammer: only the production costs count. Driving a polluting car in China seems to be getting more expensive. That's why they do it less. Driving a polluting car in, say, the US, is not getting more expensive, so they import those cars.