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the overuse of natural resources
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to be conscious of sth
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the public's awareness of sth
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to seek out sth
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a controversial issue
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environmentally friendly
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to lessen the environmental impact
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a range of sth
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established
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a growing number of (sb)
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a tour operator
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to implement a measure
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to make a difference to sth
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rebellious
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to see through sth
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to do harm to sth
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