Newly designed giant gravel batteries could be the solution to the on-off nature of wind turbines and solar panels.

新设计的巨型砾石电池可以解决风力涡轮机和太阳能电池板的开关问题。

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The cost of solar panels has dropped by 80 percent and the cost of wind turbines by close to one-third in the past eight years.

在过去八年中，太阳能电池板的成本下降了80%，风力涡轮机的成本下降了近三分之一。

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Backup power could also be provided by linking wind farms with a solar cell, with conventional or pumped-storage hydropower, or with efficient natural-gas-burning turbines.

将风力发电厂与太阳能电池、常规或抽水蓄能的水电或高效的天然气涡轮机连接起来，也可以提供备用电力。

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More than ninety percent of these jobs will be in the private sector -- jobs rebuilding our roads and bridges, constructing wind turbines and solar panels, laying broadband and expanding mass transit."

VOA: special.2009.02.27

Indeed, various companies, including GE, are investing heavily in ways to come up with cost-effective systems to store the wind and solar energy that their wind turbines and solar technologies capture in combination with other means of generating electricity and power.

FORBES: Power Opportunity for GE, et al: How To Store Wind/Solar Renewable Energy

Thousands of Americans have jobs building wind turbines and solar panels and long-lasting batteries.

WHITEHOUSE: Remarks by the President at a Campaign Event

China is now the leading producer of solar cells and wind turbines in the world.

FORBES: Beyond 'Buy American': The U.S. Needs a Clean Energy Strategy