production. Hemp oil and fibre can be imported into the US already, and indeed the US is the world's largest hemp importer. If it could be produced in the country as well, I'm sure the use would go up too, and it'd be a useful crop for some farmers to produce; legalisation is a good idea. I'm just trying to point out that 'hemp can save the world' is massive hyperbole, and the breathless enthusiasm in the Alternet article in the OP seems unwarranted. It's another useful crop, but it's legal to grow it in most of the world, and it's not 'saving' it at the moment.
There may be a few new uses coming along: biodiesel produced from hemp seed can be used at lower temperatures than many other biodiesels, which could be useful. But its yield is not as much as canola (aka oilseed rape):
Finally, there’s the relatively low oil productivity of hemp. Hemp seed does have a relatively high oil content of about 33 percent, compared with canola at about 40 percent. However, it has a low seed per-acre yield. Typically, an acre of hemp yields about 700 pounds of seed, although some farmers have enjoyed production numbers as high as 1,200 pounds an acre in good years, Hanks says. Canola growers, on the other hand, can reap a crop of anywhere from 1,500 to 2,600 pounds an acre.
http://biodieselmagazine.com/article.jsp?article_id=1434The UConn research team produced a small, lab-scale batch of hemp biodiesel. “We used a subset of the ASTM tests in order to evaluate it,” Parnas said. “One of the critical points of biodiesel is it doesn’t have very good cold weather properties…A good biodiesel will have a cloud point in the vicinity of 0 degrees centigrade. What we found when we evaluated the cloud point of our biodiesel made from hemp using the standard measurement technique, we couldn’t find a cloud point down to minus 20 degrees centigrade.”
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According to Parnas, hemp biodiesel could benefit the hemp industry by providing producers with an additional revenue stream. “For the biodiesel industry in general, it could provide a blending stock to lower the cloud point and improve the cold weather properties without going to any special effort,” he continued. “If you’ve got a certain amount of hemp-based biodiesel, it might make a very nice winter blend.”
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According to Parnas, the team does not currently have plans to continue research on hemp biodiesel. “We showed that we could convert the hemp oil to biodiesel very straightforwardly,” he said. “I’m not sure there is a whole lot of research issues as far as engineering issues go. I could imagine a lot of research issues in terms of industrial economics and optimization of crop yields and crop types.” However, Parnas also noted it is unlikely for a U.S. entity to undertake that line of research on its own.
“There is such a negative attitude towards hemp in the United States, it would probably actually be very difficult to get research funding to do this (here). I might be much more interesting to do it in collaboration with someone overseas, and we haven’t made those connections yet, but it might come out of what we’ve been doing. I’m not sure.”
http://www.biodieselmagazine.com/article.jsp?article_id=4473(By the way, who knew Usain Bolt was writing articles for the New York Times in 2007? Perhaps some naughty person has been fooling with the Wikipedia references.
The article is really by G. Pascal Zachary.