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Waste Disposal and RecyclingSec. 4-2
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Objectives
E.4.2.1 Name three methods of solid waste disposal.
E.4.2.2 Identify ways people can control the solid waste problem.
E.4.2.3 Explain how hazardous waste can be disposed of.
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Problems of Waste Disposal
What are three methods of disposing of solid waste?
Burning
Burying
Recycling
Each has advantages and disadvantages.
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Incineration
Some garbage is burned in giant furnaces called incinerators.
Advantages:
Doesn’t need landfill space.
Can be used to make electricity.
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Incineration
Disadvantages:
Expensive
Still have waste to dispose of.
Release a lot of pollution.
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Incineration
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Landfills
A landfill is basically a giant hole in the ground where people bury garbage.
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Landfills
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Landfills
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Landfills
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Landfills
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Bauxite
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Mostly Mined in Australia
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Recycling
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What Can Be Recycled?
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Precycling
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Compost
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Compost
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A Natural Cycle