The result was that ambient smog levels in the city fell about 20 ... as about 40 percent of Sao Paulo's vehicles can run on either conventional gasoline or ethanol. The Renewable Fuels ...
The central part of the country is just the latest region affected by smoke from fires in the Amazon rainforest, Cerrado savannah, the Pantanal wetland and the state of Sao Paulo. The smog crisis ...
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