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This is the Journey 2050
self-guided experience
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We are on lesson 5
about land use.
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So far in the program we have
learned about soil, nutrients,
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and the economy, and how those
three factors can either support
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sustainability or limit it. Today,
we are going to be talking about land use
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So, question for you: how much of the
Earths surface is used for growing food?
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If you take a look at the Earth,
not every portion of it is a place
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where we can grow food.
There is a lot of water,
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and it looks like a lot of places
that are not ideal to grow food in.
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To begin answering this question, I'm
going to do a demonstration with
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an apple. I want you to imagine that the
surface of the Earth is the
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surface of this Apple. I'm going to take
this apple and quarter it which will
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give us four pieces. With the apple
cut in quarters I'm going to take
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one of them away. The remaining three
represent the portion of the Earth
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Thats covered in water. I'm going to
set aside the three pieces that represent
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water on the Earth and pull back in the
one quarter of the Apple that represents
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the Earths surface that is land.
Not all land is created equal.
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So, I have cut this piece representing
the land on the Earth into three pieces.
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So, they represent 1/12 sections.
So, 1/12 of our Earth is inhospitable land
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This is places like polar regions, deserts
and mountains where it's not suitable
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to live or to grow crops.
I am going to set that piece aside
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and look at the next piece.
This is habitable land.
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This is places where people live
but crops aren't grown.
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So, think of places where houses are
built, where there's roads and development
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or public lands. This is another 1/12
section of our Earth.
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This last 1/12 section is Earths
Agricultural land.
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This is the place where our food
is grown.
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To dig a little bit deeper, I am
going to cut this piece into four pieces.
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3/4 of our agricultural land is land that
is used to raise livestock or
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to grow feed for livestock.
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The remaining quarter of this piece
which represents 1/48 of our earth
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is agricultural land that grows food
that humans eat.
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So, this is fruits, vegetables, beans,
rice, grains. Foods that are for
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direct human consumption.
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Here's a summary. So, if the
entire apple was our Earth,
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and the surface of it: 75% of the
Earths surface is water.
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25% of the Earths surface is land.
If we divide the land, we have 1/12
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section that is inhospitable land,
1/12 section that is habitable land, but
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covered in houses, roads,
and open areas.
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And the final 1/12 section is agricultural
land that produces our food.
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If we divide the agricultural land down
3/4 of that is used for livestock, feed,
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and grazing. That then the livestock
produce meat, milk, and eggs.
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And then 1/4 of that is land used for
food crops.
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This finishes up step one on your handout
And here's another summary slide if
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you need help filling out
the percentages on your handout.
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For step 2 on your handout,
pause this video and watch the
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land use video and answer the questions.
We are moving on to Step 3 now.
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This is a question I have for you that you
should be able to start answering with
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the information we have already been over
but why is land a precious resource?
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Just like water and soil nutrients that
we've already talked about,
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Land is also a limited natural resource
that we have to provide for our needs.
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Land also has a lot of uses and we have
a lot of needs for land for different
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reasons, we need land to build businesses
and industry. We need land for recreation.
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We need land for animal habitats, for
homes an roads, for food.
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So, land is a resource that is not only
limited but it's needed for a large
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variety of things.
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This is a map that shows population
statistics by country. If you look at
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the legend, the darker the color the
more people that live there.
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So just take a few minutes and take a look
at that. something that you should be
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able to gather from that is that people
typically live in the places where they
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have the things they need to grow their
food. So, things like fertile land
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ideal crops, etc.
So, thats one challenge that we face
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in our land use and sustainability is that
land that we want or are able to farm on
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is also the land where people want to
settle and live and build houses.
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Before we move forward, I also want
to go backwards back to this map
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of the population statistics by country.
Are these two maps correlated?
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Do you see any similarities between the
two maps that show population by country
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as well as the agricultural land by
country?
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I'll show you the other one once more.
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The answer is yes there is a correlation
between agricultural and the places where
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people live. Homes and businesses are very
often built in the places that have the
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best climate and soil for growing
crops.
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In summary best management practices
innovation and technology is what helps
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us only a fraction of the Earths surface
to feed a growing population.
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That wraps up step 3 of this lesson.
We are going to move on to step 4
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which is to play the next level of the
game. As a heads up in this level you're
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going to be seeing something different
that what you have in the previous ones.
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So, what you're going to be doing is
making predictions for the percentage
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of land used by nature, urban, and
agriculture in the 1900's compared to
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the year 2000. So, pause this video
an then go to your game and play
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level 5A and stop when you're done.
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To summarize what we've been learning
in the video and through this level of
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the game, Farmers have increased yields
of the food production by using better
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practices, better science, better
technology and the use of best management
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practices is whats helping us be more
sustainable in that process.
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So, how do we improve our land use choices
so that we can feed a growing world and
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still have a high quality of life
and environment?
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Alright, we are going to go through
a few examples.
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In natural habitats we're going to replace
what we use and keep the environment
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clean, plant native species, remove
invasive species and don't just talk
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about stewardship, take action.
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In agriculture we're going to improve
soil health, so hat we can grow more on
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the same amount of land, we're going to
use technology to make more efficient
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use of out inputs like water and
fertilizer. We're also going to
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sustainable use the land that
is already in production .
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In an urban setting we're going to retain
the urban wetlands and riparian areas
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We're going to reduce food waste and only
buy what we need to eat. We're also going
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to build businesses up and not out to
perserve the land we have.
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We're almost done here on this lesson.
What you're going to do now is review the
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key points these are also printed on
your handout.
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Listed as an aditional activity to this
lesson is to play the 5B level of the game
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This is a world geography game. Its a Q&A
style game that has clues imbedded in the
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questions. You're going to think of your
favorite foods and sports
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and music and travel places and
relate them to the cultures and different
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counties. You're going to explore some of
the favorite things and where they come
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from, and how trading goods from around
the world allows us to enjoy those things.
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This wraps up lesson 5 on land use.
Up next is lesson 6 on careers.