Some types of algae are about 50 % oil , suitable for biodiesel . The government is once again experimenting with algae as energy source . Scientists say there may be hundreds of thousands of species not yet identified . They have extraordinarily diverse shelf life .
Some types of algae are about 50 percent oil , suitable for biodiesel . U.S. government is once again experimenting with algae as fuel source . Scientists say there may be hundreds of thousands of species not yet identified . Algae have extraordinarily diverse sex lives .