Question

The residue left after methane production from cattle dung is:

• A. used as manure
• B. burnt
• C. used in civil construction
• D. buried in landfills

Answer 1

The correct option is A used as manure

Nature of the residue:

The leftover residue after methane production from cattle dung contains abundant organic matter rich in nitrogen, phosphorus and other elements that serve as a source of nutrients for the plants. Therefore, they can be used as manure.


Burning and burying:

Burning or burying the residue will result in not maximising the use of the residue.



Civil construction:

Cattle residue is not a very strong binding agent or a construction material to be used in massive civil construction of multistorey buildings.


Final answer: c. used as manure