List three natural inputs that can be used for a thermal power station.

Feature P is a cooling tower.
Use: Cools the hot water from the condenser by evaporation of some water, allowing it to be reused in the boiler to produce steam.

Feature R is the chimney (or stack).
Use: Releases hot flue gases and smoke produced from burning fuel (like coal) high into the atmosphere to disperse pollutants and reduce ground-level pollution.

1. Coal (fuel for combustion to produce heat).
2. Water (to produce steam in the boiler and for cooling).
3. Air (provides oxygen for combustion of fuel).