<p>These aren&#39;t your typical loos. One uses microwave energy to transform human waste into electricity. Another captures urine and uses it for flushing. And still another turns excrement into charcoal. <a href="http://m.apnews.com/ap/db_268748/contentdetail.htm?contentguid=YVIbSYEf">More</a> (Source: The Associated Press)</p>
