Acid rain is formed when carbon dioxide (CO2) and Nitrogen dioxide (NO2) react with ______.
Smog is formed when the smoke coming out of vehicle and industries mix with the ______.
Which is the cause of pollution?
An undesirable change in the ______characteristics of air is called pollution.
Rust is formed when iron reacts with ______ in the presence of water.
Incomplete burning of petrol or diesel in vehicles creates ______ gas which is very poisonous.
Combustion of coal in power plant produces mainly ______ which is a major pollutant of air.
Which gas is responsible for depletion of the ozone layer around the earth which protects us from harmful?