are we green yet ?. if you are a tree frog, your skin is green. if you are an oak leaf, you are...
TRANSCRIPT
![Page 1: Are We Green Yet ?. If you are a tree frog, your skin is green. If you are an oak leaf, you are green Are These Organisms Green?](https://reader036.vdocuments.net/reader036/viewer/2022062410/56649eca5503460f94bd7b89/html5/thumbnails/1.jpg)
Are We Green Yet ?
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If you are a tree frog, your skin is green.
If you are an oak leaf,
you are green
Are These Organisms Green?
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I AM A GREEN OAK LEAF.
I need:
My living space is :
I get water from:
Things that eat me:
Changes in my environment that affect me are:
Are We Green Yet?
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Are We Green Yet ?
I AM A GREEN FROG.
I need:
My living space is :
I get water from:
Things that eat me:
Changes in my environment that affect me are:
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Is this green ?
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• What was green in the picture?
• What do we mean by ‘green choices’?
What do we mean by green ?
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Transportation and Energy
H2O
NOx
CO2
Acid Rain
H2O
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The Chemistry of Acid Rain
NOx + Water
NO2 + H2O
Acid Rain
HNO3
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What is the problem?
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Are cars the problem?
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• What other fuels could be used?
• Are they cleaner?
What do you think?
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One Answer -- Fuel Cells
• They use hydrogen as a fuel
• Their fuel cell passes the gas through a proton exchange membrane or PEM
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Fuel Cell AnimationLos Alamos National Laboratory
A Look at the Data
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Notice in the animation:
• What combines with the Hydrogen?
• What product comes out of the tail pipe ?
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The Hydrogen Car
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Bremo Power Station on the James River west of Richmond
What do you see here?
This station burns coal to make electricity.
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Burning Coal
SO2
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The Chemistry of Acid Rain
Sulfur oxides + water
SO2 + H2O
sulfurous acid
H2SO3
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Scrubbers are inserted
• The companies that
make electricity
put in a device called
a scrubber.
It would be placed
here
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The problem doesn’t end
• Scrubbers produce lots of lime slurry that dries into fly ash.
• Now what do we do with fly ash?
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Often it goes to the landfill.
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A new solution:
• Collect the fly ash
• Compact it into a new form—
• LIGHTWEIGHT AGGREGATE—a small rock like substance
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Making Concrete
+
=+ CEMENT
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We can make concrete
• Group A—the leaf people – will make normal concrete
• Group B—the frog people– will make new concrete with some fly ash aggregate in place of gravel
• Check out your instruction sheets
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• Does your concrete look like this?
• Compare your product with one from the other group?
Making Concrete
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What have we learned ?
• We have choices to make:
OR
OR
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Your Choices:
What can we do to be GREEN ?
1.
2.
3.
4.
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Fill in your Certificate and Be Green
Green Certificate
Name _________________________I can be green by:_____ cutting off the water when
brushing my teeth_____ recycling paper, plastic or metals_____ riding my bicycle or in a carpool_____ cutting off lights and appliances when not in use_____ using fluorescent light bulbs
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More Green !
• For more information about fuel cell cars go to
http://www.fuelcells.org