Answer:
HARMFUL
-Since thermal power operates by drilling into the Earth's mantle, some poisonous gases can escape.
USEFUL
-The thermal energy is also called heat energy. The heat is very important in our daily life in warming the house, cooking, heating the water and drying the washed clothes.
Explanation:
Useful example
-The warmth from the sun.
-A cup of hot chocolate*
-Baking in an oven.
-The heat from a heater.
-The heat from the hot water.
