Still, there are many reasons to pursue such studies, he said. Electric fields can help reduce soot formation and pollutant emissions from flames.

仍有许多原因推动这些研究，他说。电场可助于降低火焰中烟尘的形成以及污染物的排放。

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Electric fields can help reduce soot formation and pollutant emissions from flames.

电场可助于降低火焰中烟尘的形成以及污染物的排放。

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Emissions from a power plant lead to the formation of acid rain.

发电厂的排出物导致了酸雨的形成。

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Part of the vision calls for flying jets in the same formation as a flock of birds, which would reduce energy use and carbon emissions.

ENGADGET: Inhabitat's Week in Green: GPS shoes, shape-shifting bicycle and a wheelchair helicopter

Intelligent planes that are propelled into the air, flock in formation and fly 'express skyways' could cut time, delays, stress and emissions, according to Airbus experts.

ENGADGET: blogger-avatar

The different instruments were needed to track down the target galaxies, measure star formation and identify mergers, and, crucially, with Chandra, see the X-ray emissions that come from heated material as it is sucked into a black hole.

BBC: NEWS | Science/Nature | Deepest X-rays tell merger story