I have some questions about adsorbed natural gas technology to those who knows: 1)Could adsorbed NG be stored at high pressures? Such as 3600 psi? 2)What is difference in energy density between CNG and ANG at the same pressure?(3600 psi)? 3)What is way of adsorbed gas retreival?Do exist some electrical way to retreive ANG such as low voltage current? 4)Should gas be liquified before ANG storage filling? 5)Could be metal foam,such as aluminum foam, used for ANG storage? 6)Is ANG less flamable (safer) than CNG?