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Could urea be a savior when it comes to reducing atmospheric carbon dioxide? By now we all know about injecting urea into diesel engine exhaust to reduce emissions of nitrogen oxides. An Australian company has now received permission from the government of the Philippines to dump urea into the Sulu Sea of that country's coast.

A Spanish company, Bio Fuel Systems, claims to have developed a way to breed plankton and turn them into oil. The company was formed this year in eastern Spain after three years of research by scientists and engineers from the University of Alicante. While the company has generated some green colored crude oil created by the phytoplankton, no vehicle tests have been performed yet, since no attempts have been made yet to refine the oil. The system combines solar energy, photosynthesis and an elec