lecture 2

4 Pages

Environmental Science
Course Code
Environmental Science 1021F/G
Tom Haffie

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EESA Notes Lecture 2Nitrogen Oxides and Sulfur Oxidescontributes a great amount in formation of ground ozones combined with volatile organic compounds and the help of the heat and sunlightform in any type of combustion processWhen in air can easily form acids acids aerosols therefore nitrogen contributes in formation of acid rain acidifies soils and open waterCan form nitrate particles when reacting with solid particles salts and can stay in the air or come back to the soil surface through rain and contaminate soilRegardless of source of nitrogen oxides nitrogen oxides can travel very far like ozoneA major affect they have on our bodies is harm to our lungs and other breathing organs The intensity and location of damage to our body depends on the forms of the nitrogen oxides o If it is water soluble it causes damage to upper areas of our respiratory system eg nose bronchioles throat o If it is not water soluble it will reach lower areas of our lungs and affect small airwaysNitrogen oxide gases are harmful to those who already have respiratory problems eg Asthmamost common or weak immune system Children are more vulnerable to such a negative effectHow are Sulfuric Oxides produced usually during the burning of coal soft coal and oil and as well from the extract of metals from oresSulfur Dioxides are very soluble and can dissolve in water vapour or water molecules in air and forms acid rain similar to nitrogen dioxideSulfur oxide gases can react with other solids and form solid sulfatesLeadMajor reason lead is found in air especially in urban areas is bc gasoline was leaded not anymoreYoung children are particularly sensitive to the aversive effects of leadLead in air can slowly deposit on soil and water surfaces can enter our food chainSome may accidentally ingest lead contaminated soilINDOOR AIR POLLUTIONRecently science realized that indoor air pollution can contain 25 times higher concentrations of hazardous pollutants than outdoor air Why One reason is because modern buildings are built very air tight to conserve energy but resulted in very little ventilation and contaminated air stays in the buildings and accumulates As well most people spend about 90 of our time indoors eg children elderly pregnant women and those with chronic illnessSources of pollutantso building materials and furnishing eg wall paints o asbestos insulation not in use as much o wet or damp carpet eg chemicals on new carpets o furniture made of certain pressed wood products eg almost all wood is treated and pressed with glue which can evaporate o cleaning products and air fresheners eg Lysol o personal care and hobbies eg hairspray o Other sources can be from cooking and insecticides
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