Some methods already exist, for example wind power.

有些方法已经存在，例如风力发电。

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In Scotland, for example, wind turbines provide enough electricity to power 95 percent of homes.

例如，在苏格兰，风力涡轮机为95%的家庭提供充足的电力。

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For example, India is the world's fourth-biggest producer of wind power.

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Many renewables, like wind and solar power, are expensive, intermittent, and difficult to scale for example, while nuclear power is extremely capital intensive and faces substantial local opposition.

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Energy-efficiency and fuel-switching, for example, accounted for 40% of the projects started last year, while biomass, wind- and hydro-power made up another 24%.

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