23. What is not a factor that is causing the problem of soil resources. A. planting a single type for long periods of time causes soil degeneration. B. use of pesticides in the soil. C. to dig the soil to exploit another area. D. erosion of soil.24. What is not a source of environmental problems. A. planting pot gardens B. burning of cars. C. solid waste disposal. D. business hotels25. What is the meaning of natural resource conservation. A. to keep the natural resources by not reused B. to bring natural resources comes as rice supplies. C. managing natural resources retain value and importance to the utilization of resources and still standing. D. There are no deals.26. What is the conservation of the environment. A. students litter on the streets B. students are shelling as a gift. C. the students shot with handheld cameras, flowers D. students collect rare ferns feed at home.27. What is the conservation of the environment. A. nadet litter the lawn in front of the House. Paula b. keep the sand wearing a bottle deposit Laila. C. diving coral reefs gallery pieces and leave Kimberley D. Church and view images sathai tea drop 100 lines.28. What is electronic waste. A. bad tv. B. air conditioning broken C. waste waste computers, refrigerators. D. are all.
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