3 . Paper is one of our oldest, simplest and most important inventions. But it also presents a danger to the world in two significant ways. First, the making of paper requires the loss of millions of trees each year. Between 2001 and 2019, the world lost 386 million hectares of forest. Of the trees that were cut down, 42% went to paper production. And worldwide use of paper is expected to double in the next 40 years. Clearly, the planet cannot sustain such a high rate of forest loss.

The second great problem with paper is what happens once it is no longer useful. A huge quantity of wastepaper ends up in dumps and landfills (垃圾填埋场), where it can produce harmful gases. Paper in landfills leads to the release (释放) of methane, a gas that is a significant contributor in global warming.

One simple solution can greatly reduce both of these problems: paper recycling. Paper is mainly made from cellulose (纤维素), which makes up the cell walls of trees and many other plants. Because of its structure, cellulose can be used repeatedly in papermaking. So far, trees are the only source of cellulose that can fill the massive demand for paper products. Therefore, recycling paper is simply one of the best ways to save trees.

Thanks to advances in processing, recycled paper isn’t the dull-colored stuff many of us are familiar with any more. It now can offer the same print performance as non-recycled paper.

Effective recycling requires a consistent effort. The way to begin is with education and understanding. Once enough people realize the need for recycling, more effective recycling systems can be carried out. The massive loss of trees affects everybody on earth. Everyone should do their part to recycle paper and encourage government and industries to do the same.

4 . Some high school students think it useless to receive higher education. Therefore, they choose not to go to college. If you're one of them, think again. Here are some reasons why you should go to college and receive a good education there.

Schools and universities are the first places to get knowledge. We take that knowledge later on to build our careers after graduation. More knowledge will be gained after you start working, but without education, that job will not be within easy reach. Knowledge leads to knowledge.

While limited within the walls of the educational places, we openly explore other cultures of the world! We come to know that ours is not the only culture. Other cultures have valuable things to share, enriching our own. Education also makes us want to travel and exchange with various cultures, getting more experience.

When there's a recession in the economy（经济）, those who attended college will be more likely to find a new job than those who only finished high school and have a limited skills set. The more education you have, the more chances you will get to improve the quality of your life as you have a better job and earn a higher salary.

When you're skillful and knowledgeable, you gain access to people of similar backgrounds and tastes. It means a good education leads to excellent networking. Good networking can benefit you a lot in your later life.

A good education makes you a more interesting person. You can talk about ideas and events instead of just other people and what's on sale in stores. An educated person doesn't gossip（说闲话）, having a preference to discuss ideas and listen to what other people have to say.

5 . Who needs friends? According to most psychologists (心理学家) we all do, especially nowadays when so many other aspects (方面) of modern life are changing. It seems that having friends keeps us both healthy and happy.

The number of TV series about groups of friends shows just how important friendship is to us. Psychologist Dorothy Rowe says that many of us now turn to our friends, instead of our families, for advice, comfort and security. One woman named Rebecca she interviewed even told her that if she had got to choose between her husband and her friend, she would choose her friend.

Since our friends mean so much to us, it is not surprising that the happiest marriages are also friendships. “Once the romantic stage of a relationship has passed, it is friendship that holds people together,” says Rowe. If the couple do not make some change, they will either get tired of each other and break up or stay together and seek friendship with others.

But is friendship equally important to women and men? According to author Rhonda Pritchard, women are more likely than men to have close friends. “ You tell a friend things that you’d never tell a partner”，says one woman she interviewed. For men, friendship is usually based on doing things together rather than the private conversations that are typical of women friend. Men share time and activities like building a fence or a business, running, riding a bike, fishing or watching football, but they don’t often share their feelings.

Although many women find their relationships with a husband or boyfriend is not enough, many men say that their partner is their best friend. Even women who are very happily married are likely to become very unhappy without a close friend and can even find the breakup of a close friend as painful as the end of a marriage.

Lasting friendships can provide a lot of the same support that families provided in the past, but the perfect situation is to have your family there for as well. Friendships and family relationships can both change, but a friend will not consider you when making really important decisions in the same way that a family member will.