These days many people choose to live or work in other countries, which has been made possible because of the convenience of air travel and modern communications. I believe that this has more benefits than drawbacks.

The disadvantage of this development is the distance that is put between family members. If a person moves away it is true that air travel and devices such as skype mean that communication and contact can be maintained. However, it is likely that a person will only be able to return one or two times a year during holidays, and speaking on skype or via email is not the same as face-to-face contact.

Despite this, there are significant advantages it can bring to people’s lives. Firstly, it means that people have the opportunity to see other parts of the world and the way people live. For example, people from the West often go to work in Asia or the Middle East and visa-versa. This enriches many people’s lives as they get to learn about other languages, traditions, cultures and different ways of working from their own country.

In addition to this, on a wider level it may also benefit other countries. If someone moves abroad for work, it is usually because their skill is required there. To illustrate, nurses and Doctors often move to work in hospitals in other countries when there is a shortage, so this is very valuable to the place they move to.

I would therefore argue that although there are disadvantages of the current trend to live and work abroad, they are outweighed by the advantages. It can enrich people’s lives and lives of the people in the countries that they move to.

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There are two kinds of energy in our life. They are renewable and non-renewable sources of energy. The non-renewable energy sources include oil,coal,natural gas,... The renewable energy sources include wind, solar, biogas, hydro,... Therefore, we should use more renewable energy than non-renewable ones in the future, because the non-renewable energy sources produce a lot of carbon dioxide. That's bad for the environment, and these energy sources are going to run out soon. The renewable energy sources are abundant, cheap, clean and they're eco-friendly. They will last forever.

Renewable energy comes from a source that will not deplete. Two common examples of this type of energy are solar power and wind power. Geothermal power, hydropower, biomass, and tidal power are additional forms of renewable energy that produce power for our planet right now.

The primary advantage of renewable energy is that fewer potentially harmful emissions are released into the atmosphere. Although fossil fuels are used to create the products that allow for this power to be produced, most forms of renewable energy can become carbon neutral in 5 years or less.

The disadvantage of renewable energy is that it can be costly. Although wind power and solar power have become cost-competitive with coal-fired power and nuclear power in some communities, some forms are not cost-competitive globally yet when the cost per kilowatt hour is compared. In 2015, the lifetime cost per kilowatt hour of conventional coal was 9.5 cents, while the cost of offshore wind was 15.8 cents.

There are additional advantages and disadvantages of renewable energy to consider as well.

Nowadays almost everyone in the world has contacted with computers. A great part of them has been using the international conputer's net known as Internet. Nobody can deny the important of the Internet to our daily life. However, the Internet has its own advantages and disadvantages.

On one hand, Internet is a big global store of information. You can find many kinds of information which is available on the Internet by some popular searching engines, such as: google.com, yahoo.com,etc. It helps us to communicate with other people around the world easier. The lastest news is always updated on the Internet,too. And it is also a means of education. We can learn foreign language, look up information or take online courses. It is almost an unlimited source of education materials for you to get.

But on other hand. Internet is harmful to our health: Some people spend too much time searching and playing on the Internet which is not good for our brains and eyes. It is not only time- consuming but also destroy relationship because it interferes with family life and communication. And the viruses can spread rapidly and infiltrate systems; destroy data, software of computer. They can attack to your privacy and get some information about you.

In a word, besides learning and entertaining on some websites on the Internet, we also need to limit the time and content that can be accessed to create a secure virtual enviroment.

The Internet plays an important role in our modern life. However, every coin has two sides and we can find out pros and cons of the internet by my following provement.

The Internet is a breakthrough in developing technology. It brings us wonderful advantages. First, education is more and more improved due to appearance of the internet. Students can learn and look for basic knowledge online without spending too much time in the libarary. This leads to the fact that it is very convenient for both teachers and students to broaden their perception. Second, the internet shorten the distance of people even though they are very far from each other. Skype or Yahoo are good ways for them to contact and have fun. It is true to say that distance is not a big problem in such a developing technology world. Third, the internet makes everything easier and faster. For example, we can send or receive documentary through email for a short time wwhile 10 years ago, we need to wait foe 3 or 4 days to send to a far distence.

On the other hand, the internet also has drawbacks. People especially teenager are easily involved in computer games. They take so much time to sit in front of the screen to play games. This doesn't only affect to their health but it also decrease the amount of money which their parents earn by hard works. They can't understand that money doesn't grow on tree. Moreover, the internet prevents them from taking part in outdoor activities beacause of the internet's attraction. This will slowdown socal skills and cause their inconfidence .

In a word, the inetrnet is one of the most wonderful inventions in the world. However, it also causes trobles in our life. Thus, we should use it in moderate