Thursday, March 23, 2006

File under: Zombie / Republican Apocalypse skills:

 

Forget expensive chlorination - Tanzanian villagers used free sunlight to sterilize their water.

"I fill the plastic bottles, put the lids on, then put them on my black-painted roof where they stay for a whole day."

The sun heats the water, helped by the black roof, which helps to absorb the heat.

Solar radiation means a combination of ultra-violet rays and heat destroys the bacteria which cause common water-borne diseases like cholera, typhoid, dysentery and diahorrea.

After eight hours in the sun, it is ready to drink.

Link

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