Hydel power plants, also known as hydroelectric power plants, generate electricity using the power of flowing or falling water. This renewable energy source is considered non-polluting and renewable for the following reasons:

1. Non-Polluting:
- Hydropower plants do not emit greenhouse gases or air pollutants during their operation. Unlike fossil fuel power plants that burn coal or gas, hydropower plants do not release carbon dioxide, sulfur dioxide, nitrogen oxides, or particulate matter into the atmosphere. This significantly reduces the air pollution associated with energy generation.
- Additionally, hydropower plants do not produce any toxic byproducts or hazardous waste that can harm the environment or human health. The water used in the power generation process is returned to the river or reservoir, maintaining the natural water cycle.

2. Renewable:
- The source of energy for hydropower plants is water, which is continuously replenished through the water cycle. Rainfall and snowmelt replenish rivers and reservoirs, ensuring a constant supply of water to generate electricity. This makes hydropower a renewable energy source, as it relies on the natural water cycle rather than depleting finite resources like fossil fuels.
- Unlike non-renewable energy sources such as coal, oil, or gas, which require extraction and combustion, hydropower harnesses the kinetic energy of moving water to generate electricity. This sustainable energy generation process can be repeated indefinitely without depleting the energy source.

In summary, hydel power plants are non-polluting and renewable because they do not release harmful pollutants into the air or produce hazardous waste during operation. They utilize the natural energy of flowing or falling water, which is constantly replenished through the water cycle, making it a sustainable and environmentally friendly option for electricity generation.

Energy released by Hydel power plant is non-polluting and renewable.