Eucalyptus oil?

A reader from Hawaii writes:

"After the demise of the commercial sugar industry here in Hawaii, we were challenged with creating a "New Agriculture for our island. As a part of that effort large plantings of eucalyptus now occupy some of the lands once used for sugar. Soon those trees will be harvested. So the question is ; Can the oils found in the fall-down/ by-product (branches and leaves) of these trees be used in the production of bio fuels?"

Anybody have any info about eucalyptus oil? Leave a comment.