The
Journey Continues on Lake Michigan
Lake
Guardian was so happy to reach Lake Michigan, the third largest
lake in the Great Lakes. This area had the most farmland of all the other
Lakes, and Lake Guardian
had heard many stories about the tasty cherries of Michigan and dairy
products of Wisconsin. Lake
Guardian loves cherries, and since three-quarters of our nations
tart cherries are grown in Michigan, she headed straight down the Michigan
coastline, passing Ludington, Muskegon and Benton Harbor. Dave, the environmental
scientist, had made Lake Guardian
promise she'd stop so he could have a piece of cherry pie, and then head
over to Wisconsin's dairy farm to get a slice of cheddar cheese and a
glass of milk to go with it.
All the news that Lake
Guardian learned about the Lake Michigan area was not good,
though. She learned how hard farmers work to grow good food for all of
us to eat. Their job was harder than hers! Many farmers use chemicals
to fight off insects and weeds and to help their crops grow better, but
some chemicals can later become pollution problems for the Great Lakes.
Lake Guardian cruised
along the shore and watched how the rain washed the chemicals off the
land and carried them into the Lake. She was worried that these chemicals
may hurt her friends in the wetlands, so she stopped to collect many samples
of water and sediment to find out how much pollution was coming from the
farms and if it was harming plants and animals. Lake
Guardian also watched how the wind carried off some of the
chemicals that a farmer was spraying on his fruit trees.
Cruising to the south end of Lake
Michigan, Lake Guardian
came to the big city areas. It was exciting to ride by Gary, Indiana where
the mills were busy making steel, but she worried about where the wind
would take all the smoke rising out of the smokestacks. When Lake
Guardian arrived at Chicago, she couldn't believe how many
boats there were everywhere! Big boats carrying cargo, small boats carrying
fishermen, and people having fun in fast boats that were so loud that
they hurt her ears. It made her think about noise pollution too, and how
the noise must scare the birds and animals that live around the Lakes.
Lake Guardian thought
about all the fuel that must be going into the water from these boats,
and she decided that her favorite boats were the clean and beautiful sailboats
that relied only on the wind to make them move.
So far, Lake
Guardian had not been to an area with cities as big as Chicago.
One of the first things that she noticed was the big difference in the
color of the water. She remembered how clear and blue Lake Superior was,
and when she looked at the water at the edge of Chicago, she couldn't
see through it at all. She talked to some local fish and asked them what
they know about pollution near the big city. Rainbow Smelt told her stories
similar to Herring Gull. "Most people love how the rain clears the
air and washes the streets, but we fish sure don't. Living next to a large
city means that a lot of litter and dirt washes or blows off the streets
and into the Lake. Most people don't realize where that gum wrapper or
cigarette is going to go if they just throw it on the ground. It makes
me very sad. Rainwater also washes down the city sewers, and that is good
because it goes to a special machine, called a wastewater treatment plant,
that cleans it up first. But sometimes if it rains really hard, the sewers
overflow, causing the dirty water to overflow straight into the Lake."
After listening to rainbow Smelt, Lake
Guardian carefully gathered samples of water, fish, plants,
and mud form the shorelines of Chicago. Waukegan, Sheboygan, and other
cities on Lake Michigan. She had to travel quickly , for it was a long
way to Lake Erie. She had to travel back through Lake Huron to get there.
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Story Highlights |
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Surface
Runoff:
Surface runoff is a significant
source of pollution in the Great Lakes. It is a pathway for a wide
variety of pollutants to enter lakes. Agricultural runoff includes
pesticides and nutrients; urban surface runoff includes oils,
greases, salt (from winter road clearing), and litter.
Ground
water:
Ground water is water below the
surface of the earth. Ground water is our storage of drinking water.
It replenishes the Great Lakes, which is why it is so important to
the Great Lakes, which is why it is so important to the Great Lakes
ecosystem. As water passes through subsurface areas, some substances
are filtered out, but others dissolve in the water or are carried by
the water. This can include human-made materials that have
infiltrated into the ground or have been buried in dumps or landfill
sites. The movement of ground water is a major pathway for pollution
to reach the Great Lakes.
Hot Spots:
10
Manistique River, Menominee River,
Fox River/Southern Green Bay, Sheboygan, Milwaukee Estuary, Waukegan
Harbor, Grand Calumet River/Indiana Harbor Canal, Kalamazoo River,
Muskegon Lake, White Lake.
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Vocabulary: |
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agriculture |
runoff |
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cargo |
sewers |
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chemicals |
smelt |
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ground water |
treatment plant |
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noise pollution |
urban |
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pesticides |
wastewater |
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