1 . Cows produce much methane, the world’s second worst greenhouse gas, as they breakdown the grass. They are a large source of the greenhouse gases that are driving climate change. Now scientists have shown the pollution from cows can be reduced by adding a little seaweed (海藻) to their food.

Recently, the researchers from the University of California studied 21 cows on a farm for about five months. They taught the cows to get their food from inside a special hood, which allowed the scientists to know the amount of the methane the cows were giving off. They added a small amount of seaweed to the cows’ food.

The consequences were surprisingly good. In some cases, the cows produced 82% less methane. The improvement depended on the kind of food the cows were given. Even the worst-polluting cows produced 33%less methane. Over the five months, the scientists didn’t see any signs that the cows’ stomachs were getting used to the seaweed and starting to produce more methane again. What’s more, the cows that were fed seaweed gained just as much weight as the other cows.

But there are still some big problems with the idea of feeding cows seaweed. For one thing, there’s not adequate seaweed to feed all of the cows in the world. So farmers would have to figure out a way to grow lots of seaweed. A bigger problem is that for most of their lives, cows live in the fields, where they eat grass. That means there’s no chance to feed them seaweed every day.

Still, as the study shows, something as simple as feeding cows seaweed can help reduce some of the pollution causing the climate crisis.

6 . Helen Thayer, one of the greatest explorers of the 20th century, loves challenges. She says, “I like to see what’s on the other side of the hill.” She has gone almost everywhere to do that.

In 1988, at the age of 50, she became the first woman to travel alone to the North Pole. She pulled her own sled piled with 160 pounds of supplies, and during her trip no one brought her fresh supplies. Accompanied only by her dog Charlie, she survived cold weather and meetings with polar bears. In fact, Charlie saved her life when one of them attacked her. Near the end of her trip, a forceful wind blew away the majority of her supplies. The last week of the trip, she survived on a handful of nuts and a little water each day.

Helen goes to challenging places not only for adventure, but also for education. Before her Arctic journey, she started a website called Adventure Classroom. On the site, she shares her adventures in order to motivate (激发) students. She explains, “Although kids often see the world in a negative way, without hope for their future, we work to inspire them to set goals, plan for success and never give up.”

Helen grew up in New Zealand. Her parents were athletes and mountain climbers. Following her parents’ example, she climbed her first mountain at 9. Later, she climbed the highest mountains in North and South America, the former USSR and New Zealand.

In 1996, she took on another challenge — the Sahara Desert. She and her husband, Bill, walked 2,400 miles across it! In 2001, she and Bill traveled on foot from west to east through the Gobi Desert in Mongolia. They hope to travel to Sichuan and Tibet in China to study pandas this year.

Helen plans to continue taking trips. She’ll use her explorations, writing, photography and environmental work to create programs for her Adventure Classroom website. She wants to inspire her students never to stop facing challenges!

8 . It’s been more than 60 years since Jane Goodall started her pioneering work. In 1960, she was chosen to go to what is now Tanzania and study the little-known world of chimpanzees. Since then, Goodall has received many awards and honorary degrees as a world-famous conservationist (自然环境保护主义者). Now, Goodall has received an unusual honor. She is becoming a toy — a Barbie doll.

Goodall may not have expected to become a Barbie at 88 years old — but it’s not just any doll, it’s made out of recycled plastic. And Barbie is partnering with the Jane Goodall Foundation and its Roots & Shoots program which inspires young people to protect animals and the environment.

“You know, the main message is that every day you live, you make an influence on the planet and you get to choose what sort of influence you make,” Goodall said.

“There was a little boy of 7 in Burundi, and I had given a talk to the school and he came up to me and said, ‘If I pick out a piece of trash every day, it will make a difference, won’t it?’ And I said, ‘Yes it will. And suppose you persuade (劝说) 10 of your friends to pick up a piece of rubbish every day.’ He said, ‘Oh, that would really make a difference and then they could all get 10 of their friends, couldn’t they?’ Goodall said, “So, that’s it. The cumulative (积累的) effect of small actions can lead to big change.”

She’s been inspiring young people for decades, but now, newer generations will get to know Jane Goodall. “I sincerely hope that it will help to create more interest in the natural world,” she said about the Barbie. “Because hopefully, you know, they’ll learn more about me through the doll. And that will get them interested. It doesn’t really matter if they have a career in conservation, as long as they pay attention to conservation in their daily lives.”

9 . They say once you learn to ride a bike, you never forget. Most of us learned to ride when we were kids, and many still wear our helmets, put our feet on the pedals, and shoot off for a ride on the streets. In recent times, cycling has seen an increase in popularity, so many people raise a question:     1    

First, let’s look at the health benefits. Cycling can improve your cardiovascular (心血管的) health and burn extra body fat. Strengthening your muscles in your legs helps increase your potential torque (扭矩) and cadence (节奏).     2     A long ride in the countryside could help you clear your mind, or de-stress. But it’s not only about your body and mind there are also some plus sides for your wallet’s health.

Cycling can be a great way to go to work or get about town.     3     If you drive to work, sometimes finding somewhere to park can be a nightmare, whereas finding somewhere to chain your bike up can be much simpler. Then, on the subway, there are changes at stations and other people who go to work speaking loudly on their phones to deal with.     4     And if you’re worried about safety, there are designated cycle lanes in many major cities. In addition, wearing high-visibility clothing is another way to improve your safety when cycling on the roads.

    5     It can help you reduce your carbon footprints. Not giving off greenhouse gases into the atmosphere is better for the planet and your own environment.

So, whether people want to cycle for their health, their wallet, the environment, or a combination of all of them —the popularity of cycling is on the rise.

10 . The most attractive national parks on earth provide the most quickest way to discover how amazing the planet is. Visits to the greatest national parks in the world make you experience breathtaking natural wonders.

Arenal Volcano National Park

Anyone who has been to Arenal will probably tell you that “It’s paradise”. Arenal Volcano National Park is located in the middle of Costa Rica, Central America. The park has a continuous active volcano. In fact, you can see lava pouring down its sides. Hot springs surround this volcano. Numerous hidden waterfalls and animals-filled forests also surround the volcano.

Yellowstone National Park

America’s Yellowstone is a land of great things. First of all, this is the world’s first natural park. It is also the continen’s largest volcanic one. Yellowstone provides home to the largest group of bison (野牛) in the world. It seems like Yellowstone shows the creme de la creme (精英) of the American west.

Jiuzhaigou Valley National Park

You are going to China, and in addition to the Great Wall, you probably need to visit a great national park. You shouldn’t worry since you are pretty well covered. The Jiuzhaigou Valley National Park is more than magical. It stands among five impressive colored lakes. You will enjoy watching the fresh and clear blue sky above; while the park’s evergreen forests are full of life and energy.

Kilimanjaro National Park

You are in Tanzania again, and you probably might have known Mt. Kilimanjaro. Most of all, it is Africa’s highest mountain. All enthusiastic mountaineers dream to climb to the top of it. As a result, the Kilimanjaro National Park is most popular with them. Since great grasslands and wildlife surround the mountain, your trip to Mt. Kilimanjaro becomes more fascinating and inspiring.