Moss gas is not a recognized term. It may be a typo or a mispronunciation of "Mossel Bay Gas-To-Liquids plant," a facility in South Africa that converts natural gas into liquid fuels.
M. P. Fabricius has written: 'A comparison of socio-economic and attitudinal changes in the Mossel Bay area during the construction of the Mossgas project 1987-1990' -- subject(s): Social conditions, Public opinion, Economic conditions 'Some socio-economic and attitudinal change in the Mossel Bay area during the construction of the Mossgas project 1987-1989' -- subject(s): Social conditions, Public opinion, Economic conditions