Post on 23-Dec-2015
Chapter 5 Vocabulary
air pollutionemissionsphotochemical smogozoneacid rainozone layerchlorofluorocarbons (CFCs)greenhouse effectglobal warmingdroughtwater pollutionsewagepesticidesfertilizersscrubbercatalytic converter
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Quiz
1. Name two (2) health effects caused by photochemical smog
2. Name one (1) of the major sources of photochemical smog
3. True or False: Acid rain can be in the form of snow, sleet and fog
4. Name one effect of Acid Rain on the environment.
Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapor and other gasses.
Substances that cause pollution are called pollutants.- ash- gases
Air pollution can affect the health of humans and other living things.
Air pollution can impact the climate of the whole planet.
Air pollution is mostly a result of human activities but can also be from natural causes such as volcanoes (ash, soot, sulfur and nitrogen oxide gases)
Ozone
* Ozone is a toxic chemical found in smog
* Ozone/smog close to the earth is harmful. - causes lung problems - causes itchy, watery eyes - causes scratchy throat
* Ozone/smog high in the atmosphere is helpful - blocks harmful ultraviolet rays from the sun
Effects of Acid Rain
Forests
• dissolve and wash away the nutrients and minerals in the soil which help the trees to grow.• wear away the waxy protective coating of leaves, damaging them and preventing them from being able to photosynthesize properly.
Buildings and statues
Rivers & Lakes* the water becomes clearer, raising the water temperature and the numbers of fish and other water animals decline.
What kind of indoor air pollution is apparent here?
Carbon Monoxide is dangerous because you can't see or smell it!!
Carbon Monoxide is formed when wood, coal, oil or gas are incompletely burned
Carbon Monoxide
Greenhouse gaseswater vapor
carbon dioxidemethane
ozonenitrous oxide
The greenhouse gases in the atmosphere stop some of the sun's heat from escaping into space.
Burning fossil fuels - coal, oil and natural gas - releases carbon dioxide into the atmosphere.
THE ENHANCED GREENHOUSE EFFECT Some of the activities of man also produce greenhouse gases. These gases keep increasing in the atmosphere. The balance of the greenhouse gases changes and this has effects on the whole of the planet.
Cutting down trees increases carbon dioxide levels
Sewage!!
* wastes washed down sinks, toilets and showers
* if not treated, disease-causing organisms quickly multiply
* even treated sewage can cause pollution which results in oxygen depletion
Factory and Mining Wastes
* create metal and chemical wastes
* harm living things in water
* harm human who drink the water or feed on water organisms
Reducing Air Pollution
Emission Controls - Scrubber - used in smoke stacks to dissolve pollutants - Catalytic Converter -reduces carbon dioxide from cars
CFC Substitutes - In 2000, many countries agreed to find alternative substances to replace CFCs
Reducing Water Pollution
Sewage - Primary Treatment removes solid waste - Secondary Treatment removes bacteria
Oil/Gasoline - quick response necessary because bacteria multiple quickly when feeding on oil. - contaminated soil removed from area - groundwater pumped to surface, treated and returned
Agricultural/Industrial Chemicals - alternatives to cleaning agents and fertilizers/pesticides
Fertilizers
Fertilizer wash into water sources and cause algae to grow quickly.
The algae covers the water source, blocking light from plants below the surface.