Cool tech

I'm always interested in advances in technology which minimise environmental impact. There is an interesting new piece of air conditioning technology reported at engadget. Not only is it 90% more efficient but doesn't use f-gases with their high global warming potential, instead using a salt solution as a refrigerant. I tend to think that much of the UK could do without aircon but there are places in the world that are almost unliveable without cooling. Speaking of uninhabitable areas, there is another story that Nevada is set to become the Saudi Arabia of geothermal power. These two technologies are made for each other. Las Vegas, one of the least sustainable cities on earth, can now be a little bit greener! Finally, in the realms of greentech, a potato powered battery has been developed. This technology s being made freely available to the developing world.