By Kevin Libin, National PostDecember 6, 2009 7:02 PM South of Alberta's Badlands, where rainfall averages are lower than parts of Ethiopia, Nicholas Savidov's self-contained ecosystem has grown literally tons of fish, vegetables and fruit, for years, all with hardly adding any water. Since 2001, explains Dr. Savidov, lead plant physiologist and biochemist at this provincial crop diversification lab, he's recycled the same water, over and over, through jumbo vats, throbbing with hundreds of...
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