Why biogas is considered an ideal fuel for domestic use?

Biogas is considered as an ideal fuel due to the following reasons:

a) It has an appropriate calorific value.

b) It is easy to store, handle and transport.

c) It is easily processed from cow dung and other waste materials.

d) It has also an appropriate ignition temperature.

e) It is also environment friendly and don't cause much harm to the environment.

f) It burns smoothly and does not leave behind much residue. Infact it contains negligible non-volatile material.