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15. Why does the tour guide ask the tourists to double check their bags?To make sure no bags have been left.

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Which is NOT the source of Land Pollution?

A.Littering
B.Use of chemicals in farming
C.Sewage and waste water from homes and factories
D.Waste materials from homes and industries dumped in landfills

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Which is the effect of Land Pollution?

A.Give off bad smells
B.Pollute soil and groundwater
C.Reduce farming land
D.Contribute to the greenhouse effect/global warming

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These products are not toxic to humans.at is the meaning of ‘toxic’in the sentence?

A. poisonous
B. beneficial
C. healthy
D. useful

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Fish bones are classified into ___.

A. recyclable waste
B. Ktchen waste
C. harmful waste
D. other waste

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