The problem for operators is that even as they become more energy-efficient, network expansion and subscriber growth may still increase their overall carbon footprints.

对运营商来说，问题是即使能效得到提高，但由于网络的扩展和用户的增长，它们的碳排放将进一步增长。

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The network would be made of carbon nanotubes, which could store hydrogen power.

该网络由碳纳米管制成，能够储存氢能。

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To skirt these issues, Rinzler and his colleagues used a network of carbon nanotubes to drive current.

为了绕过这些问题，Rinzler和同事用碳纳米管网络来驱动电流。

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His breathing was measured two ways: by the experimental wireless network, and by a carbon dioxide monitor connected to his nostrils by tubes.

ENGADGET: Researchers use wireless network to monitor breathing, could save lives

The proposals would also enable the gas distribution companies to connect around 80, 000 "poor fuel households" to the gas network for the first time, and pay for carbon monoxide awareness programmes.

BBC: Energy bill rises not enough, says National Grid

Ms Gillard has promised a 30% tax on iron ore and coal mining companies' profits, a tax on major polluters to help cut carbon emissions by 5% in 10 years and a broadband network for rural areas.

BBC: Gillard sworn in as Australian prime minister