Transcript Energy – Where does it come from and why does it produce waste?

WHAT’S WRONG WITH
THIS PICTURE?
Now you pick an item…
•
•
•
•
Paper
Cotton t-shirt
Aluminum can
Leather shoes
source
Extraction
Transport
Manufacturing
Consumption
Disposal
Draw it’s life-cycle diagram…
How do we communicate a
message?
What is propaganda?
• When is it used?
• Is it good or bad?
How do we communicate a
message?
• http://www.storyofstuff.org/mo
vies-all/story-of-stuff/
What is the message she’s trying to convey?
•
Discuss the evidence she uses to support
her claims
FREE WRITE…
How do we communicate a message?
1. Why is it important for you to
critically analyze any media claim?
2. Analyze Annie’s claim.
–
Is it valid? Why or why not?
Which one is accurate?
• “In the United States, we have less than 4% of
our original forests left.”
• “Between 1920 to 2000, the number of forests
in America have actually increased.”
http://fia.fs.fed.us/slides/major-trends.pdf
How do we communicate a message?
1. Why is it important for you to
critically analyze any media claim?
2. Analyze Annie’s claim.
–
Is it valid? Why or why not?
3. If you wanted to deliver a message
similar to the one presented in The
Story of Stuff, how would you do
it? What form of media would you
use and why?
One person CAN make a difference.
• How does this video demonstrate this fact?
EXIT TICKET…
What is a Natural Resource?
• NON-RENEWABLE: any form of matter or
energy not able to be formed within a human
lifetime
• RENEWABLE: any form of matter or energy
that regenerates within a human lifetime or is
consistently available.
Natural resources are materials and components (something
that can be used) that can be found within the environment
Man-made products are composed
of natural resources
• Can you figure out what your products are made of?
Materials
Natural
Resource
Renewable
Poll Experiment?
Nonrenewable Disposal
source
Extraction
Transport
Manufacturing
Consumption
Life Cycles
• Conventionally, your
item follows a linear life
cycle pathway
• How can you turn this
cycle into a circle?
– Consider
extraction…disposal…
Share with your tablemates; be prepared to
share one example to the class.
Zero Waste…is it possible?
• http://www.youtube.com/watch?v=E1n3Fb5FqyU&feature=re
sults_video&playnext=1&list=PLB1CE7BCBBED3DA4B
You have 10 minutes now; 10 minutes tomorrow to get started….
CAN YOU PLAN A ZERO WASTE
PARTY??
How long can you last?
1. You need to get one fish each year in order to
live.
2. Any extra fish you collect, you can sell for
profit.
3. Any fish remaining in the lake will reproduce
(at replacement level).
What did you do to regulate the
number of “fish” you caught in the
second game?
• Private ownership
• Users pay approach
• Regulated access
– Use resources at rates below sustainable yield
Think about it…
• What are some natural resources that are
global common resources?
• So how would you define…
– Tragedy of the commons
– Sustainable use
• The maximum rate at which people can use a resource
without reducing the ability of the resource to renew
itself is called sustainable yield.
Resources & Reserves
Resources ≠ Reserves
• Resources – amounts of material that are
known/ assumed to exist that can be
extracted NOW or in the FUTURE for a
POSSIBLE profit $
• Reserves – known amounts of material that
can PRESENTLY be extracted for a PROFIT
– “proven”
Do Worksheet Problem #1, #2, #3
The lifetime of a resource depends on…
1. How much we have
2. How fast we use it
What reserves does the US have?
• Fossil fuels =
– Oil
– Coal
– Natural Gas
• Why are we depleting our reserves (running
out)?
– http://www.npr.org/news/specials/climate/video/
Changing estimates
• Why do reserves of resources usually last much
longer than most early estimates predict?
• How does technology, economics, and politics influence
the estimates of reserves and resources?
Year
Proven Reserves
(billion barrels)
2006
23
2009
22.3
2010
25.2
Resource Depletion
static, exponential, real world