Immigrants who find work contribute to the economy of their new country with the skills they bring and the taxes they pay.
At the same time, many immigrants send money to help family members in their home country, therefore helping to boost that economy too.
Whereas women traditionally stayed at home to cook, clean and look after children, many mothers now choose to work or are forced to do so.
Many families no longer eat meals together, and children are given the freedom to go out with friends, watch television or chat on the Internet for hours.
It is true that computers have become an essential tool for teachers and students in all areas of education. However, while computers are extremely useful, I do not agree with the idea that they could soon replace teachers completely.
For example, they learn to write reports or other documents using a word processor, and they can practise doing spoken presentations using PowerPoint slides.
The use of websites or online videos can make lessons much more interesting, and many students are more motivated to do homework or research using online resources.
Humans are responsible for a variety of environmental problems, but we can also take steps to reduce the damage that we are causing to the planet.
Gas emissions from factories and exhaust fumes from vehicles lead to global warming, which may have a devastating effect on the planet in the future.
As the human population increases, we are also producing ever greater quantities of waste, which contaminates the earth and pollutes rivers and oceans.
In this way, people would be encouraged to use public transport and to take fewer flights abroad, therefore reducing emissions.
By reusing and recycling, we can help to reduce waste.