茶犬 發問時間: 社會與文化語言 · 10 年前

大家對水力發電的看法 !!! 急~~

請問大家為甚麼覺得 水力發電 是一個好的能源??

1. it is clean

2. it is renewable

3. energy is free to used (flowing water)

4. non-pollution

請選擇一個答案 !!

感謝 ~~~ 報告要用的社會觀點!!!

1 個解答

評分
  • chen
    Lv 7
    10 年前
    最佳解答

    1. it is clean

    2. it is renewable

    3. energy is free to used (flowing water)

    4. non-pollution

    Let's give a compound question for your reference.

    Hydroelectricity is electricity generated by hydropower,

    / , the production of electrical power through the use of the gravitational

    . force of falling or flowing water. It is the most widely used form of

    . renewable energy.

    Advantages

    1 Economics

    . The major advantage of hydroelectricity is elimination of the cost

    . of fuel.

    . The cost of operating a hydroelectric plant is

    . nearly immune to increases in the cost of fossil fuels

    . such as oil, natural gas or coal, and no imports are needed.

    2 Greenhouse gas emissions

    . Since hydroelectric dams do not burn fossil fuels, they do not directly

    . produce carbon dioxide (a greenhouse gas).

    . While some carbon dioxide is produced during manufacture

    . and construction of

    . the project, this is a tiny fraction of the operating emissions of

    . equivalent fossil-fuel electricity generation.

    3 Related activities

    . Reservoirs created by hydroelectric schemes often provide facilities

    . for water sports, and become tourist attractions in themselves.

    . In some countries, aquaculture in reservoirs is common.

    . Multi-use dams installed for irrigation support agriculture with

    . a relatively constant water supply.

    . Large hydro dams can control floods, .

    . which would otherwise affect people living downstream of the project.

    Disadvantages

    Dam failureshave been some of the largest man-made disasters

    . in history. Also, good design and construction are not

    . an adequate guarantee of safety.

    . Dams are tempting industrial targets for wartime attack,

    . sabotageand terrorism.

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