In 2008 the U. S. actually surpassed Germany as the world's top producer of energy from wind.

美国在2008年就超过了德国成为世界首屈一指的风能使用大国。

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China's two major power grids are both testing systems that can store green energy from wind and solar.

中国的两大电网目前都在测试可存储来自于风能、太阳能等绿色能源发电的系统。

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So-called "REDOX" flow batteries are sometimes used to balance grid power and store energy from wind turbines or solar panels.

这种所谓的“氧化还原”流体电池通常用来平衡并网发电以及从风力涡轮或太阳能板中储存电量。

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"The next thing is to work out how technology can be transferred from rich countries to poor countries and this will involve things like investment in renewable energy, investment in wind power and solar, investment in more efficient power stations,"

VOA: standard.2009.11.04

We're not going to suddenly get all our energy from wind or all our energy from sun because we just don't have the technology to do it.

WHITEHOUSE: Help for Homeowners in the Hardest Hit States

Some state programs also legislate mandatory renewable portfolio standards that require electric utility companies to purchase designated amounts of energy from wind, solar and bio-fuel providers, typically at premium costs that are passed on to customers.

FORBES: Wind Energy's Overblown Prospects

Google says it has been carbon neutral since 2007, offsetting its greenhouse gas emissions by signing contracts to purchase renewable energy from wind farms and the like and by buying carbon credits that help finance other green power projects.

FORBES: Google Reveals Its Carbon Footprint