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Protect the Land:
What can turn rich farmland into a desert wasteland?
Soil erosion and overgrazing by animals eventually can turn rich farmland into desert wasteland
Protect the Land:
How do farmers design their fields to prevent erosion?
3 possible answers.
1. They try to limit the amount of water used for crops.
2. They keep animals from grazing in one area.
3. They plant trees to prevent soil from blowing away
Save the Trees:
What is deforestation?
It is the removal of large numbers of trees from a forest.
Save the Tree
How many of Earth's species do scientists predict will vanish within the next one hundred years.
Scientists predict about 50 percent of Earth's species will vanish within the next one hundred years.
Save the Trees
What do trees absorb and why?
Trees absorb carbon dioxide and use the carbon dioxide when they make food.
Save the Trees:
Who are environmentalists and what do they believe in?
They encourage careful management of the forest so people do not damage them.
They want people to replant trees after forests are cut down protect forests.
Reduce, Reuse, Recycle:
Where does most trash go when we throw it out?
It ends up in landfills.
Reduce, Reuse, Recycle:
What takes up more than a third of the trash in landfills and can it be recycled?
Paper takes up more than a thirst of the trash in landfills and can be recycled.
Protect the Water Supply:
What chemicals that kill weeds and insects, can pollute land and water?
Fertilizer is a chemical that can pollute land and water.
Protect the Water Supply:
What must Industries do if they pollute too much?
They must pay large fines for polluting too much.
Reduce Air Pollution:
What does fossil fuels include and what does it produce when it is burned?
Fossil Fuels include Oil, coal, and natural gas.
When they are burned they produce sulfur and nitrogen compounds.
Reduce Air Pollution:
What causes almost a third of air pollution in the United States?
Cars and trucks cause almost a thirst of the air pollution in the United States.
