Boeing has taken the lead in developing new technology to make big aircraft more efficient, more economical and more eco-friendly.

波音公司在研制新技术上处于领先地位，这些新技术使大型飞机更加的高效、经济和环保。

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Attempts should be made by scientists to explore and popularize efficient and eco-friendly techniques of recycling wastes.

科学家们应该努力去研发和普及高效环保的废料循环技术。

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In the Tower A/B of annex building, the safe, efficient, energy-saving and eco-friendly U. S. YORK central air conditioners provide excellent business environment.

辅楼A、B座，均采用美国约克中央空调机组，安全高效，环保节能，为您提供优质办公环境。

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This week Inhabitat also showcased an incredible spectrum of eco-efficient repurposed designs as we unveiled 23 finalists in our Spring Greening DIY Design Contest.

ENGADGET: Inhabitat's Week in Green: electric cars, solar planes, and really sweet lights

Kuan-Shu favors this type of efficient, eco-friendly innovation.

FORBES: Magazine Article

Whether for everyday use as a primary power source, for use during periods of peak grid demand, or for backup use during emergencies, fuel cells offer an attractive, efficient and eco-friendly solution.

FORBES: Grid Problems Boost Fuel Cell Market