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==Big picture==
=== Summary by waste source ===
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! Time period !! Development summary
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=== Summary by century ===
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! Time period !! Development summary
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| 19th century || The first human–made {{w|plastic}} is invented
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| 20th century ||
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=== Summary by decade ===
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! Time period !! Development summary
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|}
{| class="wikitable"
