BÀI LUẬN TIẾNG ANH HAY THEO CHỦ ĐỀ BÀI LUẬN TIẾNG ANH HAY Energy needs and sources Write about the energy needs of the world and the sources of energy that are available The energy nee
Trang 1BÀI LUẬN TIẾNG ANH HAY THEO CHỦ ĐỀ
BÀI LUẬN TIẾNG ANH HAY Energy needs and sources
Write about the energy needs of the world and the sources of energy that are available
The energy needs of the world are unending and ever increasing We need energy for transport, industry, lighting, warmth, cooking etc Without sufficient energy, the airplanes will stop flying, industry will grind to a halt, cities will be plunged into darkness in short the world as we know it will cease to exist
There are many types of energy sources Our ancestors used wood and
othercombustible material for burning in order to generate heat and light Today we make use of fossil fuel and we harness solar, wind, water, chemical and nuclear energy for powering the many devices that we have invented
Most of these energy sources are non-renewable, that is, they become depletedin time An example is fossil fuel Its supply is limited and it is a matter of time before it runs out An
example of a renewable energy source is wood Trees can be grown but the process takes a long time
The use of some of these energy sources causes pollution The burning of wood and fossil fuel produces smoke and other gases Harnessing energy from nuclear fission produces dangerous by-products that are difficult to manage By contrast, hydroelectric power, solar energy and wind energy are examples of non-polluting energy sources
As the population of the world keeps increasing, there is an urgent need to find and use more renewable and non-polluting energy sources
grind to a halt to stop slowly
combustible able to burn easily
depleted
to reduce something
in size or amount especially supplies of energy