E-learning is also more time-consuming than opening a book. What's more, e-learning might pose health risks. Many researchers and experts point out that using computers can be harmful to our eyes, hands and backs.

Some researchers also argue that e-learning is more environmentally friendly than sung books; I'm afraid that simply isn't true. First, computers consume electricity and, therefore, release greenhouse gases. Secondly, computer components contain toxic chemicals. I wonder if e-learning produces more pollutants than paper books do?

In my opinion, e-learning is not entirely a good thing. As a student, I still prefer to do my work with books and paper.

Chan Sing-leong, STFA Tam Pak Yu College

Greedy people waste world's resources

I would like to share my views about the responsibility of a being a global citizen. We are lucky to have been born in Hong Kong. Not only do we have the chance to be well educated, but most of us also don't need to worry whether or not we will be able to eat. This is not always the case in some less developed countries.

Yet think of the way we waste food in Hong Kong. People often order several dishes for a meal, even if they cannot finish them. They think this waste is all right as they have paid for it.

However, it is everyone's responsibility to save the world's resources and we should think twice before ordering food.

In my view, restaurants should encourage people to order the amount of food to suit their appetites and maybe offer them discounts for ordering smaller portions. This would save food and encourage healthier eating habits.

Charmy Lau Cheuk-man, King Ling College

Campaigns do not reflect democracy

We have heard a lot of news about Henry Tang and Leung Chun-ying, the two candidates running for the office of Chief Executive. They are meeting different groups of people and parties to talk about their views on issues such as housing, social welfare and economic development, and are making an effort to gain people's support.

Unlike the elections held for former chief executives Tung Chee-wah and Donald Tsang, the city has an electioneering atmosphere and, for first time, Hong Kong people seem to have a part to play in the poll. In fact, the majority of Hong Kong people do not have the right to vote for the next leader. Only 1,200 people can vote, which means the candidates need only to please them. If the candidate they choose is not the one supported by most Hong Kong people, then the people will feel unhappy and may not support the future chief executive.

I think the present political system is not democratic enough. I hope in the future, every citizen over 18 years old will have the right to elect the chief executive. I hope that one of those voters is me.

Marco Tsang Chi-hin, SKH Lam Kau Mow Secondary School

Government should help the mentally ill

I wish to talk about mental illness in Hong Kong and what the government can do to help.

While I do not think the problem is entirely the government's responsibility, it can help the situation by raising public awareness through campaigns teaching about living with illness or supporting sufferers.

The government also needs to co-operate with different organisations, mass media and private industries to share messages about healthy lifestyles, and encourage the whole community to make an effort in tackling mental illness.

There are many reasons why people suffer from mental illness, but the most effective form of helping them is by offering support so patients can help themselves.

Kwok Ying, The Chinese Foundation Secondary School