when a power station converts chemical or nuclear energy to electrical energy it converts about 50% of the energy to low grade heat

suggest how people could use this energy before the power station operators allow it to enter the environment.

why is this low grade heat energy less useful in the warm climate?

for the first one, can people use it to obtain heat?and the seconde one is because you don't need heat in the warm climate? please help.

Your answers are correct.

Homes can be heated (either water or room space) with the waste heat. It's called cogeneration. Some places and countries do this already.

http://www.aph.gov.au/library/pubs/rn/1998-99/99rn21.htm

In a warm climate, less heat is needed for room heating.

Yes, in warmer climates, the demand for heating is generally lower compared to colder climates. As a result, the usefulness of low-grade heat energy is reduced in warm climates since there is less need for heating purposes. However, low-grade heat can still be utilized for other purposes such as water heating, process heat in industries, or powering absorption cooling systems. It's all about matching the available energy to the specific needs of the area and finding ways to maximize its usage effectively.