dust, wildfires, and Variety of solid sea salt Fine Particles- <10micrometers in size particles and liquid Ultrafine- <2.5micrometers in size droplets that Human sources- coal These are the most dangerous remain suspended burning plants, particulates: irritates nose and throat, damages lungs, asthma, industrial plants, cars, unpaved roads Toxic Particulates- lead, cadmium, and PCBs can cause mutations, reproductive problems, etc Ozone _____- Colorless, Secondary pollutant Ozone in the TROPOSPHERE= BAD ozone highly reactive gas- -breathing problems, aggravate major component lung and heart disease, irritate of photochemical Humans are eyes, damages plants ozone in smog INCREASING the troposphere and DECREASING ozone in in the STATOSPHERE= GOOD the stratosphere ozone -protects us from harmful UV rays Volatile -Exist as gases in Plants, wetlands, Can cause leukemia (from benzene Organic the air termites, rice exposure), blood disorders, dizziness, Compounds -Most are paddies, landfills, oil death (VOCs) hydrocarbons wells, cows belching -Benzene Industrial solvents, dry cleaning fluids, gasoline, plastics, paints Case Study: Lead is a Highly Toxic Pollutant- Lead (Pb) is a potent neurotoxin that does not break down in the environment. Exposure causes nervous system impairment, lowered IQ, shortened attention span, etc. Between 1976 and 2000, there has been a huge drop in lead poisoning cases because the government banned leaded gasoline and leaded paint. Some children are still being exposed because of: leaded paint found in homes built before 1960 and illegal use that continued through 1978 as well as toys that are made overseas in countries that have not banned lead paint. Science Focus: Detecting Air Pollutants One way to detect air pollutants is through a biological indicator- Lichen Lichen forms from a mutualistic relationship between fungi and algae. They are good indicators because they continually absorb air. Highly Polluted Area= lichen or none at all grey-green crusty Moderate Air Pollution= orange crusty lichen
Variety of solid particles and liquid droplets that remain suspended dust, wildfires, and sea salt Human sources- coal burning plants, industrial plants, cars, unpaved roads Fine Particles- <10micrometers in size Ultrafine- <2.5micrometers in size These are the most dangerous particulates: irritates nose and throat, damages lungs, asthma, Toxic Particulates- lead, cadmium, and PCBs can cause mutations, reproductive problems, etc Ozone _____- Colorless, highly reactive gas- major component of photochemical smog Secondary pollutant Humans are INCREASING ozone in the troposphere and DECREASING ozone in the stratosphere Ozone in the TROPOSPHERE= BAD ozone -breathing problems, aggravate lung and heart disease, irritate eyes, damages plants in the STATOSPHERE= GOOD ozone -protects us from harmful UV rays Volatile Organic Compounds (VOCs) -Exist as gases in the air -Most are hydrocarbons -Benzene Plants, wetlands, termites, rice paddies, landfills, oil wells, cows belching Industrial solvents, dry cleaning fluids, gasoline, plastics, paints Can cause leukemia (from benzene exposure), blood disorders, dizziness, death Case Study: Lead is a Highly Toxic Pollutant- Lead (Pb) is a potent neurotoxin that does not break down in the environment. Exposure causes nervous system impairment, lowered IQ, shortened attention span, etc. Between 1976 and 2000, there has been a huge drop in lead poisoning cases because the government banned leaded gasoline and leaded paint. Some children are still being exposed because of: leaded paint found in homes built before 1960 and illegal use that continued through 1978 as well as toys that are made overseas in countries that have not banned lead paint. Science Focus: Detecting Air Pollutants One way to detect air pollutants is through a biological indicator- Lichen Lichen forms from a mutualistic relationship between fungi and algae. They are good indicators because they continually absorb air. Highly Polluted Area= grey-green crusty lichen or none at all Moderate Air Pollution= orange crusty lichen
u7_study_guide_filled_in.docx