june exam prep

Question 1

Suggest one environmental problem caused by incomplete combustion of
ethanol in a car engine.

Answer 1

CO is (produced which is) toxic/ poisonous/C (may be produced)
which is toxic/ C is a respiratory irritant/ C (particles) exacerbate
asthma/C causes global dimming/ smog;

Question 2

Suggest one economic problem for the car user caused by incomplete
combustion of ethanol in the car engine.

Answer 2

More fuel needed (which costs more)/Wastes fuel