Lecture 23 3 pollution and recycling
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Lecture 23.3 Pollution and recycling. Pollution types. Coal power plant. Natural : volcanic eruptions – dust, toxic gases, ash released Human made : waste from manufacturing, burning fuels, garbage. Mt. Etna Sicily. Air pollution. CH 4 + 2O 2 CO 2 + H 2 O Combustion releases CO 2

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Lecture 23.3 Pollution and recycling

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Lecture 23 3 pollution and recycling

Lecture 23.3 Pollution and recycling


Pollution types

Pollution types

Coal power plant

  • Natural: volcanic eruptions – dust, toxic gases, ash released

  • Human made: waste from manufacturing, burning fuels, garbage

Mt. Etna Sicily


Air pollution

Air pollution

CH4 + 2O2 CO2+ H2O

  • Combustion releases CO2

  • 21 billion tons a year

  • CO2 is a greenhouse gas

    Effect: world’s temperature is rising


Other air pollutants

Other air pollutants

  • NOX compounds + sunlight creates smog

  • Ground-level ozone makes asthma worse

  • Sulfur compounds make rain pH 4-5

  • Smog damages plants, crops

Smog masks in Kuala Lumpur, Malaysia


Water pollution

Water pollution

Causes:

  • Oil spills

  • Fertilizers (Eutrophication)

  • Sewage

  • Heat pollution

  • Nuclear

  • Plastics & other garbage down storm drains

Great Pacific garbage patch


Fertilizers

fertilizers

  • get into waterways

  • Extra nitrogen cause algae blooms

  • Decaying algae use up O2 in water

  • kills fish

  • Pesticides also enter the water cycle from agriculture

Clear Lake, CA


Land contaminants

Land contaminants

  • Lead – from fuels before 1970

  • Dioxin (used in making paper) causes cancer

  • Each person in the US throws away 1000 lbs of garbage a year

  • Landfills pollute ground water


Reducing pollution

Reducing pollution

  • Cleaner, efficient cars or carpooling, mass transit

  • Less energy use: turning off lights, electronics

  • Re-useable bags for groceries,

  • Proper disposal of :

  • Batteries, electronics, & other house hold toxin

  • Don’t use poisons in your house or garden


Recycling the final way to prevent pollution

Recycling: the final way to prevent pollution

  • Yard waste into mulch

  • Table scraps into compost

  • Plastic bottles become clothing

  • Paper recycling could eliminate 41% of landfill space

  • Metal recycling reduces mining, habitat destruction

Petaluma methane gas to electricity plant at

Landfill site


What can you to do now to have a clean world in the future

What can you to do now to have a clean world in the future?

Linfan, China

San Francisco, CA

  • Name one kind of air pollution.

  • Name one kind of land pollution.

  • Name one kind of water pollution.


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