Hi,this is Liz. My dads name is Gerry. I'm doing a science project where I set up two identical tanks with identical plants in it. In one is a CO2 injector made up of yeast and sugar.I'm going to do a report on the growth rate of the plants. I know that sugar is C12,H22,O11;Is there anything left besides CO2? Is all thats left alcohol? Thanks, Liz.