Whenever possible, use the speaker-phone mode or a wireless Bluetooth headset, which has less than 1/100th of the electromagnetic emission of a normal cell phone.

可能的话，尽量使用扬声器模式或者无线蓝牙耳机，它将会小于标准手机辐射的百分之一。

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Nanometer scale semiconductor materials have been studied extensively in recent years because of their important applications in photovoltaic cell, sensing, optical emission and photocatalysis.

纳米半导体材料在光伏电池、光电传感器、光谱发射和光催化等方面有着重要的潜在应用价值，因此近几年来得到了广泛的研究。

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Fuel Cell vehicle (FCV) is the vehicle that we are looking for to use clean fuel (hydrogen energy) and realize zero emission.

燃料电池汽车正是利用清洁的氢能源、并可实现零排放的汽车。

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Ford, Renault-Nissan and Daimler have agreed to jointly develop a fuel cell system to try to speed up the availability of zero-emission vehicles.

BBC: Nissan FCEV on display at a car show in Brussels in January

So, a hydrogen fuel-cell car even running ... on hydrogen derived from natural gas cuts that carbon emission by 60%.

FORBES: Magazine Article

The project to deliver a fleet of the zero emission taxis to the streets of London in time for 2012 is on track, with the first Fuel Cell Black Cabs covering a combined total of over 8, 000 miles in road and test track testing conditions.

ENGADGET: UK's first fuel cell-powered black cab hits the streets of London