(i) Puffed up appearance of dough, which is used for making idli and dosa.
(ii) Swiss cheese has large holes due to production of $C0_2$.
(iii) Methanogens produce methane and $C0_2$.
(i) Puffed up appearance of dough, which is used for making idli and dosa.
(ii) Swiss cheese has large holes due to production of $C0_2$.
(iii) Methanogens produce methane and $C0_2$.