In the main, a few techniques for containing pollution and some new systems for the exploitation and utilization of new energy sources are being introduced.

重点介绍了几种污染控制技术、新能源开发及新能源利用系统。

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The high cost of crude oil has many people looking for new sources of energy and taking a second look at some old ideas.

NPR: Squeezing Oil Out of Stones in the Rocky Mountains

What is also true is that given our energy needs in order to continue economic growth, produce jobs, make sure our businesses are competitive around the world, that we're going to need some of the old, traditional energy sources as we're developing these new ones and ramping them up.

WHITEHOUSE: President Obama Holds News Conference