What is the cause of the greenhouse effect?

Which of the following gases is not a greenhouse gas?

Formation of photochemical smog involves the following reactions in which $A$,$B$,and $C$ are respectively:
$(i)$ $NO_2 \stackrel{h\nu}{\longrightarrow} A + B$
$(ii)$ $B + O_2 \rightarrow C$
$(iii)$ $A + C \rightarrow NO_2 + O_2$
Choose the correct answer from the options given below:

Green chemistry in day-to-day life is in the use of:

Which one of the following statements related to photochemical smog is not correct?

The gas released during anaerobic degradation of vegetation may lead to