As the production of energy becomes more difficult and expensive, it naturally becomes more important to conserve the energy supplies we already have.
In countries like the United States, Australia and West Germany, for example, a very great part of the energy we use is consumed in family households and private cars. In less developed countries such as India, this is not so much the case. The more advanced developed countries are the ones that are using the world's energy resources at the greatest rate. They are also the countries that will suffer the greatest effects when world supplies of oil, for example, run out, so energy conservation becomes important for every people and every household