Choose a significant historical event in the last 100 years and explain why, in your opinion, it was important. The event can be the development of an idea, discovery or invention, a moment that expressed a change in society, or natural event. It may be n

TThe electricity invention was a breakthrough which transformed the way in which billions of people across the world work, learn and communicate. It was the first and perhaps the greatest of humanity’s step towards a life-enhancing technology.

First, electricity is an inexpensive and friendly-environment source of energy. The use of fuels like coal, oil and petroleum releases a lot of gases in the atmosphere. These are quite harmful both to the environment and the living beings. Using electricity as a source of energy does not release any kind of greenhouse gases in the environment. Moreover, when compared to other fuels like ethanol and methanol, electricity is more cost effective and affordable.

Second, electricity generates tremendous benefits for economics. Electricity is essential for agriculture. It has contributed to produce labour-saving appliances include countless types of farm implements. Agriculture even uses automatic irrigation systems, computers with satellite imagery and satellite navigation (GPS guidance) to increase yields. As farmland acreage narrows, underground farm models open up a new era in agriculture. As far as I know, a subterranean farm called Growing Underground in London have used special low-energy LED bulbs in multiple intensities. In the light of artificial lights and special planting technology, vegetables have grown extremely well and are becoming a major source of supply for restaurants in the city. This type of vegetable model can cope with population pressure, widen global urbanization, and also helps create jobs, reduces transportation costs and reduces pollution. Moreover, the energy of electricity is known as the driving force of an extensive range of industries. It plays a crucial role in operating most devices. According to a survey, previously 30,000 spindles needed 450 employees and each person controlled a machine, but now only 18 employees and a person can control 3 machines, the remaining are automated. Sweated labour is superseded by machine. The factory has been fully mechanized enabling it to produce more efficiently. Electricity has given birth to the assembly line, which means everything is produced by machines precisely and constantly. Machines can work 24/24 hours without recharging, even in dark conditions without light, while still controlling speed and quality. Therefore, people can easily overcome the difficulty of dealing with a heavy workload with machines which have been set up. In fact, electricity's advent helped to accelerate in industrial productivity on scales never seen before.

Third, electricity has had far-reaching effects on transport. Only with the advent of electricity, people can install speed cameras and the traffic light which are great contributions to the safety of people on the street and alleviates traffic problems. Moreover, electricity is an important appearance for electric vehicles invention. Trains don't need to carry their own fuel and fuel is supplied through the overhead cables. According to railway-technology.com, electric trains are more environmentally friendly too, emitting between 20% - 30% less carbon monoxide than their diesel counterparts. Figures published by the Telegraph in 2009 say that electric trains cost 20p less than diesel trains, per mile, to maintain. For the passengers, there are also benefits, with Network Rail saying the journeys in electric trains will be 'faster and quieter journeys with more seats on trains and improved reliability on some of the busiest routes'. Likewise, the electric car market is growing rapidly in the world. With diesel and petrol coming under pressure - not just from demand, but also from governments looking to reduce harmful emissions - electric cars are increasingly looking to the future of motoring. Electricity has brought smokeless journeys transport to help protect the environment.

Fourth, electricity has blown a new wind for media and entertainment. All programs are dependent on electricity. Television allows people to update information about economic, political and weather that serve the needs of life. More significantly, electricity creates a much more attractive world where we can experience 3d films, comedy. In contrast to print media, the electronic media are growing in popularity, especially among the youth. Electricity enables people to join social networking sites, such as Facebook, Instagram or chat rooms, or to maintain contact through Skype to build relationships.

Last but not least, the electricity has made outstanding contributions to medicine. Cancer, leprosy and many other fatal diseases are cured by a painless electrical contact. X-rays and electrocution are used in diagnosis and emergency. Electricity has proven effective for modern treatment of many diseases by surgery. It's terrible that patients are undergoing surgical operations without electricity.

Electricity is a boon of science to modern society. Our life will slip back to primitive age without electricity. Electricity is one of the core inventions which has driven the growth. However, the sources of energy for producing electricity are not endless. As a result, everyone should make an attempt to reduce the consumption of electricity as by using it more reasonably and effectively.