Nearly all of us have a bad habit, whether we know it or not. Some people say they want to get rid of it but don’t know the proper ways. Here’s some advice on how to get rid of bad habits.

Make a list. Write down why you want to stop a certain behavior, how it’s hurting you and how to get rid of it. This will help a lot. Look at that list regularly.

Join in other activities. It’s wise of you to do something else when you want to stop your bad habits. If you get angry easily, for example, you can practice having a deep breath or going for a walk.

Give yourself a present. Before you take action against a bad habit, decide what you’ll do to celebrate it if you reach your goal.

Keep off bad habits. If you are fat and want to lose weight, keep junk food out of your house. If you are a heavy smoker with coffee, turn to tea and keep away from friends who like smoking.

Be patient. Bad habits develop over years, so you probably won’t be able to get rid of them quickly. In fact, people often give up several times before being successful, so you should be patient.

Find support. Don’t be afraid to ask for support from friends, family or other people who have the same bad habits as you. When you talk to others, they might be able to provide advice or encouragement that you usually wouldn’t get from yourself.

When leaving school, I was pleased that my exam results meant that I could study engineering at university. But I also wanted to travel before starting my course. A friend of mine told me about the Schools Exploring Society, an organization which helps students take a gap year （a year between leaving school and going to college）. It has three foreign journeys a year, taking 16-20-year-olds on science and nature trips. I love being outdoors, and a mountaineering trip to Alaska was on offer. So I signed up immediately.

There was one problem, though. I had to raise a large amount of money for the trip. It was a big task, but I managed to make it. I washed cars, worked in a cafe and also sold off some of my old books, clothes and CDs. Then, just before starting out, I started worrying. Can I do this? Am I fit enough? What if I see a bear?

Seventy of us traveled to Alaska. The first two days after arrival were spent in a school hall preparing our equipment and five tons of food. Then we left for the beautiful Talkeetna Mountain. On the trip we dug paths and recognized plant species. Then we climbed a mountain that was over 6,000 feet high. It was tiring but exciting.

Looking back, a gap year was so right for me. I learned a lot about accepting other people for what they are. We had to help each other and it made me less selfish. My gap year has also made me more able to concentrate. Now, whenever Tm worried about anything, I think I did Alaska-I can do this!

Like most of us, I try to be mindful of food that goes to waste. The arugula (芝麻菜)was to make a nice green salad, rounding out a roast chicken dinner. But I ended up working late. Then friends called with a dinner invitation. I stuck the chicken in the freezer. But as days passed, the arugula went bad. Even worse, I had unthinkingly bought way too much; I could have made six salads with what I threw out.

In a world where nearly 800 million people a year go hungry, “food waste goes against the moral grain,” as Elizabeth Royte writes in this month’s cover story. It’s jaw-dropping how much perfectly good food is thrown away — from “ugly” (but quite eatable) vegetables rejected by grocers to large amounts of uneaten dishes thrown into restaurant garbage cans.

Producing food that no one eats wastes the water, fuel, and other resources used to grow it. That makes food waste an environmental problem. In fact, Royte writes, “if food waste were a country, it would be the third largest producer of greenhouse gases in the world.”

If that’s hard to understand, let’s keep it as simple as the arugula at the back of my refrigerator. Mike Curtin sees my arugula story all the time — but for him, it's more like 12 bones of donated strawberries nearing their last days. Curtin is CEO of DC Central Kitchen in Washington, D.C., which recovers food and turns it into healthy meals. Last year it recovered more than 807,500 pounds of food by taking donations and collecting blemished (有瑕疵的) produce that otherwise would have rotted in fields. And the strawberries? Volunteers will wash, cut, and freeze or dry them for use in meals down the road.

Such methods seem obvious, yet so often we just don’t think. “Everyone can play a part in reducing waste, whether by not purchasing more food than necessary in your weekly shopping or by asking restaurants to not include the side dish you won’t eat,” Curtin says.

The newly-elected president of Brazil, Jair Bolsonaro says that his country should withdraw (退出) from the 2015 Paris Agreement, and that Brazil’s rainforest protections are standing in the way of economic success. During the election campaign, he promised to ease protections for areas of the Brazilian Amazon set aside for native people and wildlife. Are Brazil’s rainforests in danger?

The Amazon, the world’s largest rainforest, is called “the lungs of the planet.” Each tree takes in and stores carbon dioxide from the air around it. Billions of trees pull up water through their roots and release water vapor into the air, forming tiny drops of water. The Amazon creates 30 to 50 percent of its own rainfall. Carlos Nobre, a climate scientist, says that it is almost impossible to say Just how important the rainforest is to the planet’s living systems.

Some of Bolsonaro’s support comes from business and farming groups. One supporter, Luiz Carlos, noted that farmers “are not invaders, they are producers.” He blamed the past government for supporting rainforest protections at the cost of farmers. “Brazil,” he said, “will be the biggest farming nation on Earth during Bolsonaro’s years.”

Paulo Artaxo, a professor of environmental physics at the University of Sao Paulo, says that if Bolsonaro keeps his campaign promises, then “deforestation of the Amazon will probably increase quickly — and the effects will be felt everywhere on the planet.”

Other scientists warn that if the Amazon and other tropical rainforests lose too many trees, this could affect rainfall in other areas. Without enough trees to support the rainfall, the longer and bigger dry season could turn more than half of the rainforest into a tropical grassland.