Green Options

While cleantech investment appears to be on the rebound, it’s clear the recession isn’t over yet. Mark Jensen, managing partner for the venture capital services group at Deloitte & Touche, said Wednesday that about half of the largest venture-capital firms expect to reduce their overall investments in the next few years in response to the recession.

But venture-capital firms expect cleantech to fare better than most other categories. According to the Deloitte survey, a whopping 95 percent said they plan to either increase or maintain their level of cleantech investment, with 63 percent anticipating more investment and 32 percent expecting to invest the same amount as they do now.

Solar venture investments hit a three-year low in the second quarter, the Cleantech Group said Wednesday. According to Brian Fan, senior director of research for the group, solar startups in North America, Europe, China and India raised a total of only $113.8 million for the quarter, which is down 7 percent from $365.7 million in the first quarter and down 86 percent from $834.7 million in the year-ago quarter.

Ok, so this probably isn’t necessary here in weather-neutral San Francisco, but those of you living in areas prone to intense hot and cold spells might want to take a look at the Room to Room Fan, a compact $30 door fan that circulates air into adjoining rooms.

Music fan Owen Louis was so concerned about the amount of energy used up by his iPod, that he figured out a way of charging it up … with nothing more than an onion.

Louis, 21, from Portsmouth in the UK, makes two holes in an onion, before soaking it in an everyday energy drink and connecting it to his MP3 via a standard USB cable. Incredibly, the technique (video) enables him to charge his iPod for a full hour. According to Louis, “A friend showed me the experiment as a laugh but I thought it was the greatest thing I have ever seen, and do it religiously every day.”