Why is the use of cattle dung for biogas plant more beneficial than dung cakes?

Explanation

### Step-by-Step Solution

1. **Introduction to Cattle Dung Usage**: Cattle dung can be utilized in two primary ways: it can be formed into dung cakes for direct burning or it can be processed in a biogas plant to produce biogas.

2. **Comparison of Biogas and Dung Cakes**: The question asks for the advantages of using cattle dung in biogas plants compared to using it for making dung cakes.

3. **Smokeless Energy Production**: One of the main benefits of biogas is that it is almost smokeless when burned. This results in less air pollution compared to dung cakes, which produce a significant amount of smoke when burned.

...