Bicycle-powered water treatment

How do you ensure a decent supply of potable drinking water at low cost?

In Butte, Montana , Montana Tech students have come up with an interesting solution: They rigged up a water treatment process that can be attached to and operated on the back of a bicycle . The device currently costs $1000 and weighs 50 lbs, which puts their system within striking distance of being a cost-effective mobile solution. That's good news for drought stricken areas like parts of Texas, which are so hard-up for potable water they are even turning to recycling water from toilets to ensure they have enough to drink.