| http://www.w3.org/ns/prov#value | - Carriers in Europe, Asia, Australia and New Zealand have flown using varying mixtures.Supporters say that unlike petroleum and other fossil fuels, burning biofuels adds little extra carbon to the environment because most of it already was present in the plants used to make the fuel.Tyler cited estimates that biofuels could reduce aviation???s ???carbon footprint??? by up to 80 percent.???Already,
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