A．It will reduce the amount of pollutants in the air.B．It will increase the amount of unpleasant odors from vehicles.C．It will eventually destroy the ozone layer.D．It will reduce the cost of running large vehicles.
A．It will reduce the amount of pollutants in the air.
B．It will increase the amount of unpleasant odors from vehicles.
C．It will eventually destroy the ozone layer.
D．It will reduce the cost of running large vehicles.