What gas does not harm the enviroment?

Question

That can be used in a combustion engine.

Answer 1

Every kind of gas, including hydrogen, could have bad environmental consequences. There is absolutely nothing totally safe.

Answer 2

Most of the junk comes from the carbon in gas, and the energy comes from combining oxygen and hydrogen. Ideally, the cleanest fuel would be pure hydrogen (product = water), but its very volatile and dangerous to have in high concentrations, and as a very light gas, you couldn't move it like you can liquid fuels. Also, the smaller the molecules, the less junk you have for the energy output; this is one reason why ethanol and methanol are cleaner than gasoline.

Answer 3

Methane??? I remember my bro telling me that farts were pure methane, so if we use a natural gas (like methane) we couldn't harm the enviroment anymore... we can make Methane Machines. It might get a little stinky though.

Answer 4

How about water vapor? Thats a gas.

In fact, virtually everything can have a gaseous phase.

Any thing, even water, can "hurt" the "environment" if their is the wrong amount of it in the wrong place. Anything, including mercury or whatever you want to name, is helpful to the "environment" if their is just the right amount of it in the right place.

Answer 5

none