Money, your parents told you, doesn’t grow on trees. But they didn’t say anything about diesel fuel:
In the wet tropical region of North Queensland, Australian farmers have bought over 20,000 diesel trees with the intention that in 15 or so years, they’ll have an oil mine growing on their farmland. The Brazilian Copaifera langsdorfii can be tapped just like rubber trees, but instead of rubbery latex, this tree … gives up a natural diesel.
“One hectare will yield about 12,000 litres annually,” says the nurseryman selling the trees.
This is upward of 1200 gallons per acre, and a single tree will produce for decades. As with most biodiesel, you’ll have to filter it before it gets into your tank. Not that it’s going into your tank: the tree doesn’t flourish outside tropical zones (like, say, North Queensland or Brazil).
(Via Scribal Terror.)