Question

suggested some preventive measures to reduce it

Answer 1

what we have to reduce

Answer 2

Since the question is incomplete, I'm assuming the ways to reduce pollution.

•Use of energy efficient electronic device in our homes like the LED bulbs and smart lighting appliances. We can use more of solar energy as a source of nonconventional energy systems.

•Use of shuttle service and availing public mode of transportation to commute to different places. It not only will reduce pollution but also will save money.