Gas A, which is the major cause of global warming, combines with hydrogen oxide B in nature in the presence of an encironmental factor C and a green material D to from a six carbon organic compoind E and a gas F. The gas F is necessary for breating.
(a) What is gas A ?
(b) What is the common name of B ?
(c ) What do you think could be C ?
(d) What is material D ? Where is it found ?