Best Answer

I don't exactly know this myself but I think it might be......

because it doesn't produce any greenhouse gases or carbon dioxide (CO2)


Ethanol (as a motor fuel) is not especially friendly as:

  • it produces significant pollution per distance driven because of it low energy density
  • the low energy density reduces the distance per tankful of fuel
  • tail pipe emissions contain more aldehyde and ketone than hydrocarbon fuel
  • its production requires a significant fermentation and distillation manufacturing process
  • its manufacture requires more energy in then energy out when compared to hydrocarbon fuels
  • agricultural land is taken out of food production and put into fuel production
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Q: Why is ethanol environmentally friendly?
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