目前的研究只是试验阶段，在池中进行，即使是海里也是夏威夷近海。不考虑填岛运输，敌对环境，仅在当前的自然环境下都不可行。日本投资上亿美元的研究结果是不了了之。现在，这只是一个梦，一个浮云。

We show that bioenergy production rates of >4100 GJ ha−1 yr−1 could be
achieved now in the coupled cultivation system with microbes that have greater
proven oil content and photosynthetic efficiency than H. pluvialis. The oil production
rates would be in excess of 70 toe ha−1 yr−1, corresponding to energy
production of >3200 GJ ha−1 yr−1. We estimate the cost of oil production from
photosynthetic microbes to be $84/bbl, assuming that no improvements are made
to current production technology, and that no value is attributed to the excess
bioenergy production of more than 900 GJ ha−1 yr−1 contained in the non-oil
fraction of the biomass produced. It is unreasonable to suppose that no improvements
will be made to the technology. We provide one example, a quadrupling
of individual photobioreactor capacity, that alone could reduce production costs
to almost $50/bbl. Enhancements of photosynthetic efficiency or oil biosynthetic
pathways via strain selection or bioengineering have the potential to further reduce
costs.

http://www.springerlink.com/content/328723w141754277/fulltext.pdf