These programmes will contribute to much-needed reductions in health-threatening levels of air pollutants,especially in urban areas,and eliminate many smoky vehicles from the roads.

• 空气污染物危害健康，本港急需降低污染的程度，尤以市区为然。实行上述措施，有助减低污染，并可淘汰大量黑烟车辆。