As you can see from the chart above, since 2003 investment in Clean Technology has increased an order of magnitude since 2003. While the bloom seems to be off the biofuel flower, the rest of the segment continues to garner huge capital infusions from the private marketplace. When will the ride end? Your guess is as good as ours, but it’s clear this is a cyclical business and that the present growth rate is unlikely to be sustainable without substantial financial return in the foreseeable future.

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