Just because I am an ethicist does not mean I am opposed to making money, particularly when it comes with solid scientific discoveries that benefit human kind. The field of nanotechnology carries that promise. Unfortunately, many ecorestoration, environmentalist, or "green movement" corporations are more concerned with greener wallets than a greener world.

Planktos is a for-profit ecorestoration company, based in San Francisco, which aims to restore damaged habitats. Its plan is to release "forest-sized areas" of nano-sized particles of zero-valent iron (ZVI) into the ocean, with the hope that plankton will take up that iron, engage in enhanced photosynthesis, consume greater quantities of carbon dioxide from the environment, and curb global warming.

Planktos is not the only group seeking to capitalize upon the convergence of the green movement. Green building, using the advances of nanotechnology, could make our houses better insulated, more brightly lit with less energy, more efficient in...

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