Which invention has had the greatest effect on our lives in the last two hundred years? Give reasons for your answers.

The 19th and 20th centuries are very rich about inventions that changed our lives. The automobile is one of those inventions changed people's lives. Short after its invention automobile became a necessity in daily life more than being luxury or a symbol of nobility. Today the numbers of cars are close to half of earth's population. Almost every family in developed countries owns a car. The automobile has had the greatest effects on our lives …

…it become a piece of their life with its usage and effects. It is the invention that gave man freedom of traveling wherever he wants, it changed his life and it is a necessity of life for him. In today's world cars save people's time, power and even lives. The automobiles allow people to reach places quickly, lorries, trucks carry their goods and finally ambulances save lives. All those create enormous effects on people's lives.