Lecture 23.3 Pollution and recyclingLecture 23.3 Pollution and recycling

Pollution typesPollution types

NaturalNatural: volcanic eruptions – dust, toxic : volcanic eruptions – dust, toxic gases, ash releasedgases, ash released

Human madeHuman made: waste from manufacturing, : waste from manufacturing, burning fuels, garbageburning fuels, garbage

Mt. Etna Sicily Coal power plant

Air pollutionAir pollution

CHCH4 4 + 2O+ 2O22 CO CO22+ H+ H22OO

Combustion releases Combustion releases COCO22

21 billion tons a 21 billion tons a yearyear

COCO22 is a greenhouse is a greenhouse gasgas

EffectEffect: world’s : world’s temperature is rising temperature is rising

Other air pollutantsOther air pollutants

NONOX X compounds + compounds + sunlight creates sunlight creates smogsmog

Ground-level ozone Ground-level ozone makes asthma makes asthma worseworse

Sulfur compounds Sulfur compounds make rain pH 4-5make rain pH 4-5

Smog damages Smog damages plants, cropsplants, crops

Smog masks in Kuala Lumpur, Malaysia

Water pollutionWater pollution

CausesCauses::1.1. Oil spillsOil spills2.2. Fertilizers Fertilizers

(Eutrophication)(Eutrophication)3.3. SewageSewage4.4. Heat pollutionHeat pollution5.5. Nuclear Nuclear 6.6. Plastics & other Plastics & other

garbage down garbage down storm drains storm drains

Great Pacific garbage patch

fertilizersfertilizers

get into waterwaysget into waterways Extra nitrogen cause Extra nitrogen cause

algae bloomsalgae blooms Decaying algae use up Decaying algae use up

OO22 in water in water kills fishkills fish

PesticidesPesticides also enter also enter the water cycle from the water cycle from agricultureagriculture

Clear Lake, CA

Land Land contaminantscontaminants

Lead – from fuels Lead – from fuels before 1970before 1970

Dioxin (used in Dioxin (used in making paper) causes making paper) causes cancercancer

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

Landfills pollute Landfills pollute ground waterground water

Reducing pollutionReducing pollution Cleaner, efficient cars Cleaner, efficient cars

or carpooling, mass or carpooling, mass transittransit

Less energy use: Less energy use: turning off lights, turning off lights, electronicselectronics

Re-useable bags for Re-useable bags for groceries, groceries,

Proper disposal of :Proper disposal of : Batteries, electronics, Batteries, electronics,

& other house hold & other house hold toxintoxin

Don’t use poisons in Don’t use poisons in your house or gardenyour house or garden

Recycling: the final way to prevent Recycling: the final way to prevent pollutionpollution

Yard waste into mulchYard waste into mulch Table scraps into Table scraps into

compostcompost Plastic bottles become Plastic bottles become

clothingclothing Paper recycling could Paper recycling could

eliminate 41% of landfill eliminate 41% of landfill spacespace

Metal recycling reduces Metal recycling reduces mining, habitat mining, habitat destructiondestruction

Petaluma methane gas to electricity plant atLandfill site

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

Linfan, ChinaSan Francisco, CA

1.Name one kind of air pollution.2.Name one kind of land pollution.3.Name one kind of water pollution.