从草原到海洋，生态学家们发现生物的多样化能促进生态系统的生产力，增强其稳定性。
From grasslands to oceans, ecologists are finding that greater diversity tends to boost an ecosystem's productivity and reinforce its stability.
这个过程叫做化能合成，并且很多不同的微生物都能利用这种能源，比如世界各地生活在岩石和土壤中的微生物。
This process is called chemosynthesis, and a lot of different microbes can do it, microbes living in rocks and soils all over the world.
尽管商业化的太阳能电池业务可以追溯到50年以前，但是太阳能板在成本的考量上依旧无法与生物能源相竞争。
Although the commercial solar-cell business dates back almost 50 years, solar panels still cannot compete with fossil fuels when it comes to generating electricity relatively cheaply.
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