module 6 period one 2-全文預(yù)覽
【正文】 blem in many areas of the developing world，where， according to the United Nations’ estimates， unsafe sanitation causes half of all people are particularly at which cause diarrhea(腹瀉 ) are responsible for the deaths of about million children a ， standard lavatories simply aren’ t practical in remote areas. The challenge set by Bill Gates was to e up with a latrine(戶外廁所 ) which works without running water， electricity or a septic tank(化糞池 )． It also needed to operate for less than 5 cents( RMB)． 28 designs were displayed at the recent Reinvent the Toilet Fair in Seattle， them was one which turned poo(糞 ) into electricity using microwaves， another which converted poo into charcoal， and yet another which used urine(尿 ) for flushing. But the winner was a solar powered design which generated hydrogen gas and team from the California Institute of Technology picked up a prize of $100,000， almost 650,000 RMB. Clearly Bill Gates doesn’ t feel he’ s flushing money down the the Seattle event he said， “ We couldn’ t be happier with the response we’ ve gotten.” Gates has even pledged $370 million ( billion RMB) more to the future toilet hope to field test more prototypes over the next three years. 1． Why is Bill Gates paying people to invent new toilets? A． He is concerned about
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