Question

In the village area, people make cow-dung cakes and use it as a fuel for cooking. This irritates the eyes and causes lots of pollution.
Give any 2 benefits of your suggestion.

Answer 1

When cow-dung cakes are used as fuel for cooking, It causes air pollution as it produces a lot of smoke. One way to reduce this problem is by using cow-dung as biogas instead of using it directly as fuel. The benefits of using biogas as fuels include

1. It gives a clean fuel as it does not produce smoke.

2. It has a high calorific value and easy to handle.

3. The residue produced after the burning of biogas is rich in nutrients and it is used as manure.