Directions : read the following article and do exercises.
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 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 person and every household.
Generally, the average use of energy in the united states, per head of population, is about twice as great as in Australia.
Energy can be saved in ever home if we become aware of how much we use. For example, if simple insulating materials are used in building houses, especially in ceilings and walls, the energy used for heating and cooling can be reduced by about a third over the year. As a large proportion of home energy use is for heating water, solar heaters can make a big contribution here. It is possible to link the solar with the normal system so that the main’s supply is only used to supply what the solar heater cannot do, and this can make big savings.
In simple ways it is possible to save a good deal of the energy normally used in the family car. For example, if people use smaller cars they will save on the consumption of petrol tuned and is driven at moderate speeds since, generally, the higher the speed a car is driven the greater is the amount of petrol used.
Also, it is better to combine several short trips into one, for engines use more fuel when warming up and many short trips always mean that some of the distance to and from your home is covered more than once
In the future it is certain that we will need to use smaller cars and also smaller and less luxurious homes if the world’s supply of energy, however it is made, is to sufficient.