Researchers at Japan's Tsukuba University are urging companies as such Toyota and refiner Idemitsu Kosan to join a project aimed at developing algae to convert wastewater into oil and remove carbon dioxide from the atmosphere. The project has successfully used Botryococcus algae to produce 1,000 metric tons of oil per hectare per year in a laboratory setting, a researcher said. The researchers plan to reproduce the results starting in September at a $16 million open-air facility at Tsukuba's campus near Tokyo.

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