Bioo recharges your iPhone with a green plant | iGeneration

You are right, remy, it is better not to calculate the economic profitability. But above all, we must avoid calculating the profitability and ecological viability:

• what does this gadget cost and what is the ecological balance sheet? • what is the ecological balance sheet of its transport? • how could we use 120€ for more useful purposes for the planet?

I haven't done all the calculations yet, but a first approximation indicates that this is the very type of false good idea. Pseudo-green like everything. Now, posting the recipe in open-source, to tell everyone how to do this at home, with nothing more than a pot and some local produce, it would be much more effective.

David MacKay, British physicist and great theoretician of Bayesian information analysis, who has just died at 48, wrote an online book for those who want to check their false intuitions about energy:

http://www.withouthotair.com/c6/page_38.shtml

One of David MacKay's most startling lessons: a conventional 40W light bulb left on 24 hours a day consumes 1 kWh; an average car at medium speed traveling 50 km consumes 40 kWh.

We are ready to eliminate the incandescent bulb in favor of LEDs which consume 5-10 times less energy. But we are reluctant to give up the car, which would have an impact 40 times greater on the energy balance, pollution, climate and non-renewable resources.

Trading flower pots around the world in order to pretend to save a few watts is an irresponsible idea.