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 this is not so much the case. The more advanced as India, countries are the ones that are using the world's energy resources at the greatest rate. Ihey 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 person and every household.