| http://www.w3.org/ns/prov#value | - The oil, which contains carcinogenic substances, is dangerous to human health.The test flight opened up the possibility of using other types of biofuel, including those made from recycled gutter oil, for aviation purposes, said Zhao Xuebing, a lecturer specializing in bio-energy research at Tsinghua University.But Zhao cast doubt on the commercial viability of biofuel for use in jets because the t
|
