What type of power plant is virtually pollution free

A power plant that is virtually pollution free would be a power plant that does not consume gas, petrol, coal or any of the other resources that may cause pollution.

The virtually pollution-free plant will be mainly depending on natural renewable sources of energy

Examples:

1 - geothermal plants (including dry steam plants, binary cycle plants and flash steam plants)

2 - solar plant

3 - wind turbines

4 - water turbines