your troll scientist claimed that the car can run on water ALONE using "his kit".
CO2 comes from burning/oxidation of carbon containing substance in ample supply of oxygen.
I only read "Cars that run on a synthetic fuel, made from water and air" this part, this is not something that interests me. My troll scientists used Water and Air is available everywhere he didnt have to say i used air with water. maybe he made something by a fluke that worked in the same manner this is working. but at the time all the high flying scientists on PDF were saying that it not even imaginable. Now everyone is saying yes off course I know it can be done..no questions now...everyone understands everything about it and it is kosher