Question

disadvantages of using cow dung cakes as a fuel

Answer 1

1. They contain important nutrients, so instead of using them as fuel, using them as manure would be wiser.
2. They produce smoke, causing air pollution.
3. They have low calorific value.
4. They produce large amount of ash as residue.

Answer 2

Disadvantages of using cow dung cakes as a fuel.

1. Burning of dry dung-cakes causes pollution of the air.
2. Dry dung-cakes after burning leaves a large quantity of ash.
3. Burning of dung-cakes destroy useful plant nutrients.
4. Dry dung-cakes has a lower calorific value.