Recycling is beneficial in two ways: it reduces the inputs (energy and raw materials) to a production system and reduces the (17)__________ of waste produced for disposal. A study conducted (18)__________ the Technical University of Denmark found that in 80% of cases, recycling is the most efficient method to (19)__________ household waste. Some materials like aluminum can be recycled (20)__________ as there is no change to the materials. Recycling aluminum saves 95 % of the energy cost of processing new aluminum because the melting temperature is (21)__________ from 900°C to 600°C. It is by far the most efficient material to recycle. Recycling plastic saves 70% of the energy used in creating new plastic, and paper recycling saves 40% of the energy required to make a new (22)__________.
- A. number B. amount C. quality D. numbers
- A. via B. with C. in D. by
- A. add B. store C. get rid of D. maintain
- A. indefinite B. definite C. indefinitely D. indefinable
- A. reduced B. increased C. grew D. gone up
- A. producing B. product C. products D. produce
