The products of photochemical smog are peroxyacetyl nitrate and ozone. 

Photochemical smog can be suppressed by certain compounds, which act as free radical traps and also by installation of efficient catalytic converters in the automobiles.

Dew point temperature is defined as the temperature to which the air would have to cool (at constant pressure and constant water vapor content) in order to reach saturation. A state of saturation exists when the air is holding the maximum amount of water vapor possible at the existing temperature and pressure.

At room temperature, nitrogen is a very inactive gas. It does not combine with oxygen, hydrogen or most other elements. 

Air is not a part of the biotic environment.

During the burning of fuels, carbon and hydrogen present in the fuels are released into the atmosphere in the form of carbon oxides and water vapors.

Air can be separated into its components by means of fractional distillation.

Major primary pollutants produced by human activity include

1. deforestation
2. excessive use of fossil fuels
3. excessive use of fertilizers

Aquarium is an example of man made ecosystem.

Plants are biotic component of our environment.

Population increases in G.P.

Glass is non - biodegradable.

The physical & biological world, where we live is called environment.

According to chemical point of view, air is a mixture of various gases, water vapor and dust.

The metallic core of lithosphere is called lithophile

Troposphere is the lowest layer of Earth's atmosphere. The troposphere starts at Earth's surface and goes up to a height of 8 km to 16 km above sea level.

The correct order, in which things flow from the interior of the earth, from top to bottom is water, natural gas and oil. 

Nitrogen is present in the highest amount in the air. Nitrogen (N₂): 78.09% Oxygen (O₂): 20.95% Argon (Ar): 0.93% Carbon dioxide (CO₂): 0.038%