As long as you do not have it loaded and have it in your trunk in a container, you can transport it anywhere.
No they are not.
u need a license for it and get it qualified as a vehicle my friend made his own buggy, he has to get it verified as a vehicle first If you mean gas as in gasolene then no they are not illegal. If you mean gas as in butane/propane/methane etc, the next oneI see will be my first.
Carbon Dioxide
Carbon dioxide is taken in while oxygen is expelled.
you cant board with it but you can leave it in your checked baggage. <><><> Correct- but if it is a gas gun, no propellant gas cartridges allowed, either in carry on or checked baggage.
No it is not illegal to have a plastic gas tank
Where I live this is illegal. But all LPG is the same, the vehicle fuel is just taxed for road use.
Carbon dioxide and atmospheric nitrogen enable plants to carry on photosynthesis
Actually, any online purchases from evike, airsoft gi, or any store that ships via UPS cannot sell you legally green gas. The only way to pick up green gas is through a local airsoft dealer. I am not positive but you may be able to find some at Academy.
Green gas is green gas. It doesn't matter
The 2013 Lincoln MKX is a gas-powered vehicle.
Chlorine (Cl) is a green gas.