8. Typical customers of a landfill are __________________.
9. To dispose of a ton of trash in a landfill,customers have to pay tipping fee of ____________.
10. Materials that are not permitted to be buried in landfills should be dumped at ____________.
Unit 1
1. Y 2. Y 3. N 4. N 5. Y 6. N 7. NG
8. municipalities and construction companies
9. $10 to $40 10.drop off stations
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