Which part of the electrostatic precipitator is maintained at several thousand volts ?

Which particles are responsible for causing the greatest harm to human health ?

According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health ?

When the exhaust passes through the catalytic converters, what happens to the unburnt hydrocarbons ?

When the exhaust passes through the catalytic converters, what happens to the carbon monoxide and nitric oxide ?

Motor vehicles equipped with catalytic converter should use unleaded petrol because

Which expensive metals are fitted into catalytic converters of the automobiles for reducing emission of poisonous gases ?

Which part of the electrostatic precipitator attract the charged dust particles ?

Two thirds of sulphur dioxides are produced by

Which is the worst polluted city among the world with respect to air pollution ?