Name the pollutants are released by the jet aeroplanes?

What are pollutants ?

Name the cells that are released from the thymus gland. Mention how they help in immunity?

What is pollutant ?

Which pollutant is released from the paddy fields?

How does an electrostatic precipitator work to remove particulate pollutants released from Thermal Plants.

An aeroplane, when 3000 m high, passes vertically above another aeroplane at an instant when the angles of elevation of the two aeroplanes from the same point on the ground are 60^@ and 45^@ respectively. Find the vertical distance between the two aeroplanes.

Name natural air pollutants.

Particulate and gaseous pollutants along with harmless gases are released form the thermal power plants. Name any two harmless gases released.