Fir tree photo by Kconnors at  morguefileWhat can be done with the Christmas trees laying naked along roadsides or left unsold in vacant lots? With a little ingenuity and science, Christmas trees can be recycled in other uses, such as biofuels or even fish habitat.

Surplus Christmas trees in Australia could become jet fuel after completion of a new plant built by the airline Qantas.

And, according to a team of scientists at Virginia Tech, leftover trees may someday be used to produce hydrogen fuel.

(READ more Tainted Green)

Fir tree photo by Kconnors at  morguefile

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