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OUR FRAGILE PLANET . Done by Ksenya Chernysheva , grade 6. AIR.

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  1. OUR FRAGILE PLANET Done by KsenyaChernysheva, grade 6

  2. AIR Air - a natural mixture of gases, mainly nitrogen and oxygen component of the earth's atmosphere. The air contains the oxygen required for the normal existence of the vast numbers of living organisms (respiration, aerobes). Fuel combustion in air of humanity has long been receiving the necessities of life and production activities of heat.

  3. FIRE Fire - in the narrow sense, the totality of the hot gas or plasma, emitted as a result of fire. It is the main phase of the combustion process and has the ability to self-propagation of the affected their other combustible materials. Proper temperature fire depends on the source that caused the reaction of inflammation and / or materials involved in the combustion reaction.

  4. Internet links http://en.wikipedia.org/wiki/Air_pollution#Pollutants http://en.wikipedia.org/wiki/Fire http://www.google.com/

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