There is no doubt that the invention of the car offered our planet a new way to live.
Technology, especially cars, has totally come in our lives.
In my opinion, cars are necessary in today's world, although there are many things which make us think that we should stop using cars.
To begin with, they make our life very fast.
Many people all over the world have stopped waste their time on long trips to their friends and family.
As you know, wagons are not very fast.
Trade between cities and travelling are faster than ten centuries ago.
You and I are travelling by car, bus or other transport but wagons.
Despite of this, cars have made us an ecological problem.
Many scientists on every continent are trying to find a solution.
Air pollutions damage our ozone layer which protects us from deadly ultraviolet radiation.
However, there are places which have not changed.
It seems to be impossible but, for example, tribes in Australia do not need rubber wheels and petrol engine.
They travel by foot.
To sum up, I would argue that although cars have certain disadvantages, people want to improve their lives.
However, I think that we should try to prevent environmental damage.