Not pollution control. this is due to consumption explosion. You pack up every inch of soil you own with concrete. Not letting sufficient vegetation cover to imbibe rain water into ground. The main problem is not smoke from your vehicle, but due to indiscriminate mining and manufacturing, that is too to satisfy your artificial needs. Minimize them first. Pollution starts at the point of wants and gradually emerges out at the point of utility, manufacturing and mining. Limit the space under concrete and expand the space under vegetation. Concentrate first on availability of pure air, potable water and unadulterated food, they are utterly scarce now. Concrete and gadgets are nor our aim. Welfare !!!!!! Questionable is human life, because materials have overpowered the nature and natural being, that is human being.
