One of the difficulties with investing in early stage cleantech startups is that oftentimes the investors need to take a very long term view of the companies they back — many startups won’t mature into commercial firms for years. This is particularly difficult when technologies are risky — even speculative — and the investment is made at an early stage.

via The perils of cleantech investing: KiOR & the long term, high risk view — Cleantech News and Analysis.