With the passing of the years the technology improves. About this reason people can be more comfortable in daily life, for example one important topic is about transportation, as it was before and how it has evolved over the years.
Many years ago, in general transportation when people wanted to travel to other country, they spent more time, because they didn’t have the technology that we have nowadays.
Many people had few methods to travel, such as floats, old ships and also with some animals, but the technology  improved these methods because nowadays we have different machines that they help us to travel more effectively, no like years ago, when one trip takes a lot of days and now it takes only hours.
As well as give us benefits, also we have risks because they are not friendly with the environment. They produce chemicals that harm all living.