A primary air pollutant can be defined as a pollutant which is released directly into the air from the source of it's origin. It includes gases like sulphur dioxide, ammonia, particulate matter, volatile organic matter, nitrogen oxides and carbon monoxide. A secondary air pollutant is a pollutant that is not directly released from a source into the atmosphere, instead it can be defined as aggregation of primary pollutants with the atmospheric gases.
Smog is an example of secondary pollutant, it cannot be included in the primary pollutants. It is formed by combination of primary pollutant with oxygen, water and hydrocarbon present in the atmosphere.
Photosynthesis converts carbon dioxide and water into oxygen and glucose. ... Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.
Spores are used by groups of ancient plants and fungi in one stage of their reproduction. ... Spores grow into intermediate plants called gametophytes. Neither of these groups of plants produces flowers. Pollen is used by flowering plants to fertilize seeds.
