Ethanol is an alcohol that can be used as fuel for internal combustion engines in eg. passenger cars. In Sweden, for example, the E85 is sold, with about 85% ethanol and 15% petrol in the summer and 75 % ethanol and 25 % petrol in winter (but signs etc. do not change in winter but still indicate "E85"). In addition to ethanol and gasoline, this fuel also contains the denaturing agents MTBE/ETBE and isobutanol. The fuel in the E85 is, among other things, for the cars to handle cold starts easier, because preheated injectors are not used yet.
Exhausts from ethanol vehicles are relatively harmless, but combustion gases such as E85 may contain a relatively large proportion of hydrocarbons from the gasoline. Pure ethanol does not cause any harmful hydrocarbon emissions and no soot is formed in an ethanol engine. It is lower energy content in ethanol, which means that you get higher fuel consumption compared to eg. petrol. Ethanol cars often have slightly higher service costs than other cars. Unfortunately, there may be poor production methods in the production of the fuel, you could produce potential food raw materials instead.