Q31 of 269 Page 149

The constituent of biogas which makes it an excellent fuel is :

Biogas constitutes methane gas about 60% within it.

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29

Which of the following is not an example of a biomass energy source?

 30

Most of the sources of energy that we use represent stored solar energy. Which of the following is not ultimately derived from the sun's energy?

 32

The major component of biogas is :

 33

Which of the following is more environment friendly ?