How has the use of CNG in automobiles reduced pollution in our cities?

Explanation

### Step-by-Step Text Solution:

1. **Introduction to CNG**: Compressed Natural Gas (CNG) is a cleaner alternative to traditional fuels like petrol and diesel. It is primarily composed of methane, which is a hydrocarbon.

2. **Combustion of CNG**: When CNG is burned in automobiles, it undergoes combustion. The chemical reaction during combustion typically produces carbon dioxide (CO2) and water (H2O) as the main products.

3. **Reduction of Harmful Emissions**: One of the significant benefits of using CNG is that it does not produce harmful pollutants such as carbon monoxide (CO), nitrogen oxides (NOx), and particulate matter, which are common in the combustion of petrol and diesel.

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