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Burning sugar cane for harvesting may provoke asthma

BMJ 2007; 334 doi: (Published 24 May 2007) Cite this as: BMJ 2007;334:1082

Air quality in Brazilian cities has improved with the substitution of ethanol (refined from sugar cane) for petrol (gasoline) but at the expense of those living in rural areas. Daily measurements were made of …

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