The path towards sustainable energy sources will be long and sometimes difficult.

通向可再生能源利用的道路是漫长的，有时是困难的。

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In the policy aspect, the traditional concept has to be changed to taking new energy and renewable energy as sustainable energy sources of the country in the middle 21st century.

从政策思路上，要改变传统观念，把新能源和再生能源作为21世纪中叶我国的持续能源。

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The building features sustainable design, incorporating natural energy and light sources.

建筑可持续性设计包括将自然能源和光源结合。

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The path towards sustainable energy sources will be long and sometimes difficult.

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We know an abundance of sustainable energy sources are now at hand thanks to the risk taking and ingenuity of American entrepreneurs and energy companies.

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Green Party spokeswoman Jenny Jones urged the government to be more courageous in moving Britain from a "fossil fuel culture" to sustainable energy sources like wind, solar and water.

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