"Cleantech" being a catch-all term that covers a wide range of mostly disconnected industries and markets and technologies, it's always interesting to note commonalities across subsectors where you can find them.
One such macrotrend which I believe will end up driving a lot of cleantech innovation is the emergence of distributed alternatives to previously centralized processes.
There are two factors underlying this trend.
First of all, long-range transportation costs appear likely to be higher going forward, simply because they are so dependent upon oil prices. This is not a given. But there are reasons to believe oil prices are likely to rise over the medium to long run,...