1What is bioenergy? Why is it called a renewable energy?
2What is biomass? What problems arise when loose biomass is burnt?
3How is a carbonized briquette made? Write the steps in order.
4What is the difference between a carbonized and a noncarbonized briquette?
5Write the precautions to follow while using briquettes. Why must a briquette never be burnt with the doors and windows closed?
6What is biogas? Which gases does it contain?
7Describe the construction of a biogas plant and how it works.
8Write the advantages of using biogas.