Pollutants. What is a Pest? Unwanted insect, plant or animal causing disease or damage. Unwanted insect, plant or animal causing disease or damage.

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Presentation transcript:

Pollutants

What is a Pest? Unwanted insect, plant or animal causing disease or damage. Unwanted insect, plant or animal causing disease or damage.

Classes of pesticides… Organochlorines Organochlorines Organophosphates Organophosphates Carbamates Carbamates Pyrethroids Pyrethroids Phenoxy herbicides Phenoxy herbicides

Silent Spring… Written by Rachel Carson in Written by Rachel Carson in Pesticides affecting air, water, land. Pesticides affecting air, water, land. Led to formation of USEPA Led to formation of USEPA

Problems with pesticides… Toxic (eg. Organophosphates) Toxic (eg. Organophosphates) Bioaccumulation/Biomagnification (eg. Organochlorines) Bioaccumulation/Biomagnification (eg. Organochlorines) Persistent (eg. Organochlorine) Persistent (eg. Organochlorine)

Chemical indoor air pollutants… Exposure to higher concentrations over prolonged period of time. Exposure to higher concentrations over prolonged period of time. Harmful effects include allergic responses, asthma, cancer. Harmful effects include allergic responses, asthma, cancer. Carbon monoxide, Lead, mercury, pesticides, volatile organic chemicals Carbon monoxide, Lead, mercury, pesticides, volatile organic chemicals

Biological indoor air pollutants… Mold Mold Mildew Mildew Dust Dust Pollen Pollen Pets Pets

Air, Water and Soil Pollution Units 4 and 5

Criteria air pollutants CO CO Lead Lead Nitrogen oxides Nitrogen oxides Ozone Ozone Sulfur dioxide Sulfur dioxide Particulate matter Particulate matter

Greenhouse effect… What is it? What is it? Concerns? Concerns?

Water pollution… Ocean pollution Ocean pollution Freshwater pollution Freshwater pollution Agricultural run-off Agricultural run-off Groundwater pollution Groundwater pollution

Land pollution… Anthropogenic sources---- Mining Mining Agriculture Agriculture Urban sprawl Urban sprawl Underground toxic wastes Underground toxic wastes “toxic sludge”---municipal sewage + rain “toxic sludge”---municipal sewage + rain

Land pollution… Natural sources---- Forest and wildfires Forest and wildfires Earthquakes Earthquakes Tornadoes Tornadoes Floods Floods Hurricanes Hurricanes Landslides/Avalanches Landslides/Avalanches

Wetlands… Filter pollutants Filter pollutants Buffer for flooding Buffer for flooding Natural reservoir for flood water Natural reservoir for flood water 1 in 5 endangered species dependent on wetlands for survival 1 in 5 endangered species dependent on wetlands for survival

Mining… Destructive to land, forests, rivers, plants animals. Destructive to land, forests, rivers, plants animals. Heavy metals, acids etc contaminate the soil. Heavy metals, acids etc contaminate the soil. Mined land unable to support vegetation so hard to restore. Mined land unable to support vegetation so hard to restore.