Pierre COLOMBOT's blog
Since the dawn of time and until the 18th century, the only sources of energy used on earth were renewable: wood fire for cooking and heating, animal traction to plough the fields or to move around but also sometimes a windmill or water mill. Fossil fuels appeared: first coal, then oil and gas. Today, renewable energies are once again rising in power in a totally new form: large wind turbines of several megawatts, photovoltaic solar panels, production of algae for the manufacture of 3rd generation biofuel, etc. In 50 or 100 years these renewable energies will undoubtedly be dominant.
In the same way, less than 2 centuries ago, the only toilets available were those at the bottom of our great-grandparents’ garden. In the cities, we emptied the chamber pot from the window and shouted “watch out for the water” (in England, this became “gar loo”, loo designating the toilet today, in colloquial language). Then flush toilets were invented, extremely practical but costly in terms of pure water (upstream) and pollution (downstream). We can assume, without taking too many risks, that as in the field of energy with the parenthesis of fossil fuels (a few centuries, that is to say almost nothing on the scale of history) the flushing in 100 or 200 years, will be supplanted by modern dry toilets. The latter will recycle organic matter and recover phosphorus in urine.
I graduated from Ecole Centrale, went through the Caisse des Dépôts and then the university, and created Sanisphère in 1991. Since then, I’ve enjoyed innovating.