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Imagine that at the end of this century, when your human grandchildren have been born, planet earth will be a scorched dust-bowl and humans will only survive on the fringes of the Antarctic. Do you think that’s a possibility? Hard to imagine? Well humans, I’m sorry to say but this is indeed what will happen if radical changes aren’t made in global carbon emissions over the next few years. Some humans even think it’s too late, but, like a lot of dogs I’m keeping optimistic that people will wake up and smell the coffee.

What’s a dog to do?

Well, yesterday, in spite of the rain, I took myself off, with my humans, to the new Cultivate/Eco-Unesco building, The Greenhouse, in St. Andrew Street (where Enfo used to be, opening to the public on 2nd December) for a lunchtime seminar on Carbon Tax. The humans were very interested. I was mildly interested at first and just wanted somewhere to curl up and dry out from having walked into town in torrential rain. But… I couldn’t believe my dog-ears! I had no idea how serious the situation really is. The picture for the future of planet earth, home to us all, is bleak - the rain forests torched, the polar ice caps melted, heat and dust everywhere.

…and it’s not the dogs doing it!

Look at the past few weeks in this country… has the torrential, bucketing-down rain put a smile on your face each day? I wouldn’t think so. Look at the top left photo - that’s me and the position I’ve been in for the past few weeks. There was nothing else for it but to take to the bed and stay dry. Now, take a look at my photo below before things started to get really bad. That’s me carpooling with my human wearing my happy, smiley dog-face.

What kind of world do we want to live in because from where I’m standing it’s looking like we’d better get used to the fact that endless rain might not be a passing weather phase but a permanent fixture in this country.

Our climate is changing forever, unless you do something and do it now. I’m saying this as your Best Friend and I’m hoping that we dogs won’t have to re-evaluate this age-old relationship…!

“Let it rain, let it rain, let it rain…” What if our beloved Irish rain was actually a national energy asset? Following on from my last post about piezoelectricity generated from foot and car traffic, brilliant minds at CEA/Leti-Minatec, an R&D institute in Grenoble, France, have recently developed a system that can harvest energy from falling raindrops.  “Our work could be considered as a good alternative to power systems in raining outdoor environments where solar energy is difficult to exploit,” Thomas Jager told PhysOrg.com, and he could be speaking specifically to Ireland, where, especially in winter, we can’t guarantee the sun, but can expect a healthy dose of rain.

For those of you with a technical bent, this is how it works: the scientists use a polyvinylidene fluoride (PVDF) polymer, a piezoelectric material that converts mechanical energy into electrical energy. When a raindrop impacts the 25-micrometer-thick PVDF, the polymer starts to vibrate. Electrodes embedded in the PVDF are used to recover the electrical charges generated by the vibrations, thus converting the raindrop’s mechanical energy into electrical energy.

Slow falling, large raindrops generate the most energy because raindrops falling at high speeds often lose some energy due to splash.  The scientists haven’t yet developed the mechanism for storing this energy, but surely with developments in wind and wave power surely this can’t be far behind?

A number of other organizations are working on piezoelectric devices as well: Zhong Lin Wang at the Georgia Institute of Technology has devised a sensor that can harvest mechanical energy by bending zinc oxide nanowires: he wants to put it in a shoe, so as you walk you generate power. There’s also Trevor Baylis, inventor of the wind-up radio, who designed and used a piezoelectric boot to power his mobile phone during a hike across the Namib desert.  TEXON International is looking to raise £1m to further develop these electric shoes.

One of the beauties of piezoelectricity is that the tools involved are not beyond the reach of a clever diy inventor: while not everyone has PDVF lying around, the essence of piezoelectricity is a copper wire, that when bent produces a negative/positive charge; when the pressure on the wire is relieved, an electrical current can be detected.  So who’s up for singing in the rain?