BBC地平线：无人驾驶汽车的黎明

     The car has shrunk the world, increased personal freedom and in so many ways expanded our horizons, but there is a flipside       Fumes from car exhausts have helped to destroy our environment, poisoned the air we breathe and killed us in far more straightforward ways       But all that is going to change       　　This episode enters a world where cars can drive themselves, a world where we are