Ecofriend

I always thought that the Submarine technology was pretty cool and when viewed in a isolated fashion of just using air tanks, was pretty clean too. Of course, there is enormous amount of energy involved in all of that, but this is without a shadow of.

So we have moved on from building simple torches and Grey Water Systems to building a whole submarine. Now is that one heck of a progress, or what? It seems soon we are going to tell you how to build a solar powered space shuttle and an ether powered...