4 ms·ICE burns hydrogen and emits water, is that zero emissions ?by geggam 7y agoICE burns hydrogen and emits water, is that zero emissions ?avmich 7y agoUsing fuel cells, the resulting water can be brought back, without releasing water in any form at the altitude.nradov 7y agoThey aren't going to bring back any water. It's too heavy.avmich 7y agoAgree :) that would be logical.