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| Healthy tips on cellphone use |
| ☆Try to (81)keep your cellphone away from your body,both when using it and sleeping. ☆Using the speaker or an (82)earphone is a good way to reduce the radiation. ☆Avoid using a cellphone to make (83)long conversations. ☆Don't press the cellphone to your ear until the person you are calling (84)picks up the phone. ☆Listening more and talking(85)less can lower the risk of cancer. ☆Don't use your cellphone when the signal is (86)weak or when moving at a high speed. |
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| Advantages | Disadvantages | |
| Wind Energy | Clean.There is a lot. | It needs (57)wind. |
| Water Energy | (58)No pollution | It is expensive. |
| Geothermal Energy | (59)Cheap | only possible in a few places. |
| Solar Energy | Clean and plentiful. | It depends too much on (60)weather. |
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