Methane.
Carbon is not a green house gas, but CO2 and CH4 are, and others too, but these are just two commonly known ones.
carbondioxide
Cement production releases carbon dioxide as a greenhouse gas.
yes
No.Hydrogen gas is not a green house gas. Hydrogen chemically combined with oxygen becomes a green house gas. Water vapor is the most common green house gas making up about 75% of all warming.
Green House Gas
The true gas that causes it is CO2
carbon dioxide
CFC or chloroflourocarbon
Carbon Dioxide.
That is China
mankind has started to run off all machines, apparently machines release carbon dioxide which is called a green house gas, a green house gas traps in heat from the suns energy. the more green hous gas the hotter