Two types of fuels, Bio X and Bio Y, both made from natural resources, are increasingly being used by vehicles around the country. Recent tests indicate that the complete combustion of a volume of Bio Y releases fewer pollutants in the air than the complete combustion of an equal volume of Bio X. Since both the government and the people of the country are determined to bring down the pollution levels in the long run, it can be expected that in 30 years from now, a significant number of cars will
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