Final answer:
Yes, hydrogen gas is indeed produced by some bacteria and algae and is a natural component of flatus. This biological production contrasts with industrial processes like electrolysis that require energy, highlighting hydrogen's role in both biology and renewable energy applications.
Step-by-step explanation:
The statement that hydrogen gas is produced by some bacteria and algae is true. Certain types of bacteria and microorganisms, through processes like fermentation, can produce hydrogen gas as a metabolic byproduct. Similarly, some algae, under specific conditions, can generate hydrogen, which can be used as a gas for fuel. Moreover, hydrogen gas is a natural component of flatus (commonly referred to as farts), which is due to microbial fermentation in the digestive system of animals, including humans.
This process in bacteria and algae can be contrasted with industrial methods like electrolysis, where energy is needed to force substances like water to release hydrogen atoms. Additionally, methane (CH4), another gas commonly produced by anaerobic bacteria, is a significant component of natural gas and can be harvested from landfills and used to generate electricity. Thus, biogenic gases like hydrogen and methane are of interest not only biologically but also for their potential as renewable energy sources.