Q.1.
What are biofuels made from?
Q.2.
Biogas is primarily made up of which gas?
Q.3.
Biogas is made by which process?
Q.4.
Biogas generators can be filled with which of the following?
Q.5.
In a biogas generator, what does the animal or plant material supply?
Q.6.
Methane is a greenhouse gas and contributes to...
Q.7.
Which of the following is caused by global warming?
Q.8.
What is biodiversity?
Q.9.
Biogas is produced at a faster rate if the temperature is...
Q.10.
Biogas generators are useful in developing countries such as Africa, because they easily and cheaply get rid of what?