They often talk about the need to save heat in apartments, houses, and use hot water sparingly. Why?

It is often said that it is necessary to save electricity, gas, and water. First, prudent owners do it in order to pay less for utilities. Because their cost is not cheap, a certain part of the family budget is spent on paying for these services. But if he talks about a problem on a large scale, savings are necessary in order not to exhaust the resources of nature. There is a problem with electricity, water and gas (there are large gas reserves in the Russian Federation, Qatar, Iran).