Question

The term “Dark Fermentation” means
(1) a method to reduce CO2 in the atmosphere
(2) a method to produce hydrogen as fuel from waste water
(3) a method to dispose nuclear waste
(4) a method to produce methane from organic waste

Answer 1

I think option (2) is correct.

Answer 2

dark fermentation is a process in which we convert organic molecules into biohydrogen. process of dark fermentation is similar to anaerobic conversion. this process is done by fermentation bacterias.

so your correct answer is the term dark fermentation means a method to produce hydrogen as fuel from waste water.

so your correct answer is option no (2)