computer are widespread used, as far as radiation of them is concerned, scientific evidence has shown that radiation that a working TV or computer produces has the potential to cause brain cancer. In addition, there are more generalized environmental problems caused by the power production of air conditioning. Becaused a large percentage of electricity is created by coal-burning power plants, air conditioning contributes indirectly to the release of greenhouse gases and other pollution.It cannot be denied that the development of household goods may have some drawbacks. However, taking all factors into account, its advantages carry more water. From my point of view, the use of household appliances should be advocated and encouraged.TOEFL listening lectures: Which of the following is true of biological indicators?
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