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Bionavitas is making a long-term bet on cheap biodiesel from algae. But more promising today is "bioremediation," or using algae to treat polluted waste water.
Algae farming start-up Bionavitas is planning on raising tens of millions of dollars to commercialize technique for bringing more light into algae bioreactors and ponds.
A "skunk works" team is considering a wide range of technologies to clean up oil in the Gulf, using ideas from outsiders at a scale never done before.
Even as the world waits to see whether BP can permanently stem the flow of oil into the Gulf, the company is evaluating technologies to clean up the disaster.
CARS, Carbon Algae Recycling System, is a project that plans to use CO2 to grow algae that can clean toxins and make fuels.
Mayor Chuck Reed is betting that San Jose, Calif., can become the world's clean-tech capital, whether in spite of or helped by a stagnating economy and high energy costs.