I know everyone touts energy as one of the big things to be mindful of when designing sustainably. While that is certainly true, WATER is a resource that people tend to overlook in design. It's cheap for most of us in the US and easy to get to a clean supply and because of this, we tend to overlook conserving water when we can.
For the rest of the world and parts of the US, this isn't the case. Lake Mead in Nevada for instance is at an all time low. That ring represents the water level we used to have.
The guys who invented the Segway (for whatever you think of that motion device for the non-walking) are working on a water purification tool. The Slingshot. incredible. especially at $2k a unit. Water becomes a commodity.
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