Pollution

1
Pollution Evolution

• How human pollution impacts the survival of
  species on earth.

2
Benefits of Active Transportation
Exercise, clean air, no traffic, and fun!
3
Charles Darwin Natural SelectionEvolution
Extinction
4
Natural Selection, Evolution, Extinction

• Species best adapted to environment survives.
• When environment changes species evolve or go
  extinct.

5
Today, you are a bird.

• And there is nothing birds like better than fat,
  juicy moths.
• You will catch them with your Beak
• There are two colors of moths.

6
2 Peppered Moths

• Both taste good.
• Both have equal nutritional value.
• Your job? Eat as many moths as you can in 60
  seconds.

7
THE RULES

• One Beak (tweezers)
• 60 seconds.
• Catch as many moths as you can and put them in
  the cup.
• At the end, tally up all your moths by color, and
  fill out the tally sheet provided.

8
Moth Tally Sheet
ON PEPPER Black Moths caught Pepper
caught Total caught Black (Black/Total) Peppe
red (Peppered/Total)

• ON BLACK
• Black Moths caught
• Pepper caught
• Total caught
• Black (Black/Total)
• Peppered (Peppered/Total)

9
What did you notice?

• Which color moth did you get more of on the
  peppered background?
• What about on the black background?
• Why do you think that is?
• Which moth color would survive better?

10
The Real Peppered Moth

• Hard to see?
• The peppered moth uses CAMOUFLAGE, the same color
  and pattern as the bark of the trees.

11
Black Peppered Moth

• Which is easier to see?
• The fact that it probably gets eaten more is
  NATURAL SELECTION.
• Black moths were rare!
• Only 1 black moth had ever been documented.

12
Manchester, England- Air Pollution

• In the early 1800s, the INDUSTRIAL REVOLUTION
  began.
• Factories were powered by burning coal (a oil
  based fossil fuel).
• Burning of coal created heavy soot pollution.
  It snowed black ashes.

13
Soot Covered EVERYTHING.Black moths became 98
of the population.
14
Pollution changes our environment.

• Smog (smoke fog) is a problem. Look at LA!
• Air pollution has dangers you cant see Carbon
  Dioxide

15
CO2 - Invisible Pollution

• Carbon Dioxide , CO2 is a clear gas that occurs
  when anything is burnt.
• Too much CO2 makes the planet warmer, faster than
  species can adapt.
• If the environment warms a few degrees, many
  species will go extinct.

16
Severe CO2 causing shortness of breath

• Ask the cyclists of the first Tour of Beijing.
• The CO2 was at least 5x the legal limit in
  Europe.
• Riders complained that there was not enough
  oxygen to breath.

17
Carbon Dioxide Demonstration

• Can we see an invisible gas?
• CO2 that is HEAVIER than most gases in the
  atmosphere.
• CO2 will sink creating a bottom layer of gas.

18
What does CO2 do to other species?

• CO2 adds to Global Climate Change
• Changing the environment means many species will
  go extinct.
• Unlike natural selection, we are causing the
  extinction.

19
Can humans go extinct???

• What do humans need to survive?
• No one knows how the climate will react to the
  greenhouse gases.

20
The best way to reduce air pollution CO2?
Transportation

• Walk, bike, carpool, and take public transport.
  Avoid unnecessary trips!
• 61 of Carbon Dioxide emissions in Marin County
  are from vehicles.
• Electric engines also help reduce CO2.

21
Conclusion

• Pollution can greatly impact life

Peppered Moths
Natural Selection Extinction Evolution
Charles Darwin