With me, electricity is one of the great inventions because it has brought many benefits for people. Firstly, electricity can be used to light up all houses and streets at night. It helps us to see everything clearly and do what we want during the darkness. Secondly, electricity is also useful in heating during winter and cooling during summer. In the hot season, the air-conditioner can keep us cool. In cold areas, electric heaters can keep us warm and healthy in long winters. Finally, we can use electricity to run machines. Without electricity, factories, schools, and hospitals cannot run normally. Everyone and everything will stop working. In conclusion, electricity plays a very important role in our life today and we cannot deny it.