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Let's play with the verbs
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Past form of the verb: Pollute
polluted
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Past form of the verb: save
saved
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Past form of the verb: waste
wasted
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Past form of the verb: Produce
Produced
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Past form of the verb: change
changed
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Past form of the verb: recycle
recycled
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Past form of the verb: decide
decided
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Past form of the verb: conserve
conserved
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Past form of the verb: use
used
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Past form of the verb: collect
collected
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