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

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 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