我们为什么要保护野生动物英语作文简单(经典20篇)

The passage mainly tells us the importance of protecting traditional Chinese culture, which is challenged or facing extinction because of the developing society and changing lifestyle. Besides, China is nationwide sparing no efforts to do it.

The protection of national and folk culture is of great significance to Chinese cultural diversity and also to the harmonious development between local economic and social development. It is reported that the Guangdong government pays special attention to protecting Chaoju，a local drama born in Chaozhou in the eastern Guangdong province.

In my opinion, some measures should be taken to protect traditional culture effectively. To start with, we should make a law to regulate the society’s performance. Besides, we should draw more people’s attention to it, for the more they know about the importance of culture protection, the stronger the support we can get from the public.

In a word, it is high time for us to treasure and develop our own valuable culture.

Chinahas a very long and brilliant history, whose people are so friendly

and hospitable. But I am wondering why some people pay such little attention to

the environment and nature. In many places of the countryside, rivers have

become stinking sewers and brooks have disappeared. Heaps of garbage obstructs

the scarce flow of dirty water. The grounds are littered with plastic bottles

and bags. People are cutting down trees even though it is illegal. In some

towns, rubbish is hidden behind walls. Garbage cans are often of little use,

making cleaners must rush all day long and also by night to clean the

rubbish.

This lack of consideration for nature in general is extremely detrimental

to children’s education, toChina’s image, to public health, to tourism and to

the future.Chinais the common treasure of all Chinese, and we should live up to

be a member of this big family, a descendant of 5000-year-plus ancient civilized

country. I think the environment must absolutely be strictly protected by all

means. This protection should go at the same pace as the marvelous development

of the nation.

In this respect,Germanyis a rare model and leaves me a very deep

impression. After you have an exciting tour around in this country for a week or

so, it is unnecessary for you to polish your leather shoes. Personally, first of

all, the strong awareness of people’s environmental protection; then, the

advanced technology applied in the field of preserving the nature; We can learn

form others in building China into one of the most environmentally friendly

places in the world.

保护动物

It was a fine day today and the sun was bright。 I visited Beijing Zoo with my classmate， He Song。 The animals were so interesting that all the people loved them。 When a bear asked for some food by waving its ann， a visitor threw something to it。 At once I went up to him and said without thinking，Dont do that。 Its bad for it。 If you really love them， take good care of them。 His face turned red and answered he wouldnt do that again。

这天是个风和日丽的好天，我和同学贺松去了北京动物园。动物们是那么可爱，大家都十分喜欢它们。一只熊挥动着胳膊向人们要吃的，一个游客就投进去了什么东西。我想都没想就走过去说：“不要那样做。你的做法对它们没好处。如果真的喜欢它们，就就应爱护它们。”他的脸红了，并且回答说他不会再那么做了。

随着科技的发展，我们的环境也越来越差了，清新的空气已经不在了，小编收集了关于保护环境的英语句子，欢迎阅读。

1、Its everyones duty to love and protect the environment.

爱护和保护环境是每个人的责任和义务。

2、But some people dont care about it.

但是有些人却不关心或不在意。

3、The most important question in the world today is pollution.

当今世界最重要的话题就是污染问题。

4、The amount of water which is suitable to drink is less and less.

适合人类喝的水是越来越少了。

5、Even worse, they pour dirty water in to rivers.

更糟糕的是他们排放污水到河流里。

6、They waste a lot of water in their daily life.

日常生活中他们浪费很多水。

7、Something must be done to stop the pollution.

人类必须采取一些措施来制止污染。

8、They throw rubbish into rivers , too.

他们还乱扔垃圾到河流理去。

9、Do not throw rubbish onto the ground. Do not waste water. Use both sides of paper when you write. Stop using plastic bags for shopping. Make classrooms less noisy.

不要在地上扔垃圾。不要浪费水。当你写字时要在纸的两面都要写。停止使用塑料袋去购物。减少教室里德吵闹声。

10、Planting trees Trees are very helpful and important for us.

树对我们人类是多么的重要和有用。

11、No one can live without water or air.

没有人能离开水和空气生存。

12、we cant live without water.

没有水我们就不能生存。

13、We should take many measures to stop pollution.

我们应该采取许多措施去停止污染。

14、Without the shade from trees, Earth would get too hot to live on.

没有了树荫，地球将会变得太热而不能生存。

15、Many rivers and lakes are seriously polluted.

很多河流湖泊已经受到严重污染。

16、As we know , water is very important to man.

我们知道，水对人类来说是非常的重要。

17、We need to protect Earth because it is our home.

我们需要保护地球因为它是我们的家。

18、Its our duty to save water.

节约水是我们每个人的责任。

19、We should plant more and more trees in order to live better and more healthy in the future.

为了将来我们的生活过得更好、更加健康我们应该种更多的树。

20、We dont need to do big things—we can start out small.

我们不需要做大事，我们可以从小事做起。

21、Lets do our best to make it more beautiful.

让我们尽力让它更美丽。

22、We should stop factories from producing harmful gases.

我们应该阻止工厂生产有害气体。

23、If we dont save water, the last drop of water will be a tear-drop of us.

如果我们不节约水，那么最后一滴水也许会是我们人类的眼泪。

24、We are using up our natural resources and at the same time polluting our environment with dangerous chemicals. If we continue to do this, life on earth cannot survive.

我们一边耗尽自然资源，一边产生化学污染物。如果继续这样做的话，地球上的生物将难以生存。

25、Protecting the environment is every mans responsibility.

保护地球环境是每一个人的责任。

26、if everyone could make a big contribution to environmental protection, our home will become much more beautiful.

如果每个人为环境保护作出一点贡献，我们的家园会变得更加美丽。

27、Protecting the environment，everyone，s duty.

保护环境，人人有责。

28、The short life of the flowers away, leaving behind the beauty is forever.

带走的花儿生命短暂，留下的美丽才是永远。

29、Governments of many countries have established laws to protect the air, forests and sea resources and to stop environmental pollution.

许多国家制定了法律来保护大气、森林和海洋资源，制止环境污染。

30、The protection of trees, that is, to protect themselves。

保护树木，就是保护自己。

31、In addition to the photos, nothing taken away; In addition to the footprints, nothing left.

除了相片，什么都不要带走;除了脚印，什么都不要留下。

32、Have green trees, have the pulse of the earth.

树木拥有绿色，地球才有脉搏。

33、Earth is our home, you rely on green.

地球是我家，绿化靠大家。

34、We are using up our natural resources and at the same time polluting our environment with dangerous chemicals. If we continue to do this, life on earth cannot survive.

我们一边耗尽自然资源，一边产生化学污染物。如果继续这样做的话，地球上的生物将难以生存。

35、Protecting the environment is every mans responsibility.

保护地球环境是每一个人的责任。

36、if everyone could make a big contribution to environmental protection, our home will become much more beautiful.

如果每个人为环境保护作出一点贡献，我们的家园会变得更加美丽。

37、Protecting the environment，everyone，s duty.

保护环境，人人有责。

38、The short life of the flowers away, leaving behind the beauty is forever.

带走的花儿生命短暂，留下的美丽才是永远。

39、Governments of many countries have established laws to protect the air, forests and sea resources and to stop environmental pollution.

许多国家制定了法律来保护大气、森林和海洋资源，制止环境污染。

40、The protection of trees, that is, to protect themselves。

保护树木，就是保护自己。

41、In addition to the photos, nothing taken away; In addition to the footprints, nothing left.

除了相片，什么都不要带走;除了脚印，什么都不要留下。

42、Have green trees, have the pulse of the earth.

树木拥有绿色，地球才有脉搏。

43、Earth is our home, you rely on green.

地球是我家，绿化靠大家。

My good friend is XX.She’s a girl(or boy).She is my classmate.

Mei is tall and thin.She has two big eyes and long hair.She likes listening to music and reading books.Sometimes we listen to music together.She likes summer.Because she can swim in the summer holiday.She likes pink and white.She is in Class Four,Grade Six with me.She usually goes to school by motor cycle.Sometimes she goes to school on foot.We often go shopping together on the weekend.

We will be good friends forever.

我的好朋友

我的好朋友是XX。她是一个女孩（或男孩）。她是我的同学。

梅是又高又瘦。她有一双大眼睛和长长的头发。她喜欢听音乐和看书。有时我们一起听音乐。她喜欢夏天。因为她可以在暑假游泳。她喜欢粉红色和白色的。她在四班，六年级的我。她通常是骑摩托车上学。有时她步行上学。我们经常在周末一起去购物。

我们永远是好朋友。

[简单英语作文我的朋友

however mean your life is,meet it and live it ;do not shun it and call it hard names.it is not so bad as you are.it looks poorest when you are richest.the fault-finder will find faults in paradise.love your life,poor as it is.you may perhaps have some pleasant,thrilling,glorious hourss,even in a poor-house.the setting sun is reflected from the windows of the alms-house as brightly as from the rich mans abode;the snow melts before its door as early in the spring.i do not see but a quiet mind may live as contentedly there,and have as cheering thoughts,as in a palace.

the towns poor seem to me often to live the most independent lives of any.may be they are simply great enough to receive without misgiving.most think that they are above being supported by the town;but it often happens that they are not above supporting themselves by dishonest means.which should be more disreputable.

cultivate poverty like a garden herb,like sage.do not trouble yourself much to get new things,whether clothes or friends,turn the old,return to them.things do not change;we change.sell your clothes and keep your thoughts.

[保护环境作文英语80个单词

安徽黄山被联合国教科文组织定为世界自然文化遗产。假设外国友人到你校参观后，准备去旅游。请根据要点向外国友人简单介绍黄山（ the Yellow Mountain ）。

（ 1 ）位于安徽南部，是中国著名的旅游胜地。每年有大批中外游客前去旅游观光。（ 2 ）乘汽车去大约要花 3 个小时;也可以乘火车或飞机去。（ 3 ）登山便可领略其云海（ the sea of clouds ）、奇松（ wondrous pines ）、怪石（ unique rocks ）等秀丽的风景及清晨美丽的日出。

注意 1、词数： 80 词左右。 2、请不要逐字翻译。

The Yellow Mountain is one of the most famous mountains in China 。 It lies in the south of Anhui 。 Every year thousands of Chinese and foreigners pay a visit there 。 Its not far from here 。 It takes you about three hours to get there by bus 。 You can also go there by train or by plane 。 While you are climbing the mountain ， you can enjoy the sea of clouds ， wondrous pines and unique rocks around you 。 In the early morning when the sun rises ， the sky looks very beautiful 。 Its really a nice place to visit 。

[向外国友人简单介绍黄山英语作文

The global polar bear population could decline by more than 30 percent in as little as 35 years. Thats according to a new study in The Royal Societys Biology Letters.

全球北极熊数量在35年内可能下降超过百分之30。这是根据英国皇家学会生物学快报的一项新研究。

Researchers looked at climate change effect on the Arctic Sea and calculated the likelihood of this projected population drop is 71 percent.

研究人员观察气候变化对北极海的影响，并计算出预计种群下降的可能性为百分之71。

Thats because polar bears stand on Arctic Sea ice when hunting for seals. According to NASA, even the thickest ice in the Arctic Ocean has "either thinned or melted away."

这是因为北极熊捕猎海豹时站在北极海的冰上。美国国家航空航天局表示，甚至北冰洋最厚的冰要么变薄或要么融化了。

And just this week, scientists reported sea ice levels in the area were at a record low for this time of year.

就在本周科学家报告称，该地区的海冰水平创下一年中这个时候的历史新低。

This all adds up to not great news for polar bears. With an estimated population of 26,000, the bears are already listed as a vulnerable species by the International Union for the Conservation of Nature.

这对北极熊不是什么好的消息。现估计有26,000头北极熊，已被国际自然保护联合会列为易危物种。

With the development of science and technology, peoples living standards are getting higher and higher, environmental problems are more and more serious, you found it?

Lets talk about water pollution! Gas stations and other factories always put the water without purification to the river, resulting in small fish without home. 50% of our country can not use clean water, this figure is not terrible? So saving water is imminent, you still waste it?

Lets talk about the problem of reducing trees! Now a lot of trees have been cut down by us, so the dust storm came, the flood came, nature to revenge us. We all know that the use of disposable chopsticks are made of trees, if each of us every day can use a pair of disposable chopsticks, one year down can keep ten thousand trees, see this time, you are still presumptuous Behavior?

Lets take a look at the sky, the blue sky is gone, the white clouds are hidden, is it really gone? No, they are just "smoke" by the smoke from the factory.

These are water caused by it? Are our own human beings, if not felling of trees, garbage, a reasonable discharge of purified sewage, I believe our planet will be beautiful. Protect everyone from the earth, let us work together to protect the environment!

随着科技的发展，人们的生活水平也越来越高，环境问题也越来越严重了，你们发现了吗?

咱们就来说说水被污染的问题吧!加油站和其他工厂总是把未经过净化处理的水排放到河里，导致小鱼没有了家。我们国家有百分之五十一的人都无法用到干净的水，这样的数字难道不可怕吗?所以节约用水已是迫在眉睫，你还在浪费吗?

我们再来说说树木减少的问题吧!现在好多树木已经被我们砍伐叻，所以沙尘暴来了，洪水来了，大自然来报复我们了。我们都知道使用的一次性筷子都是用树木做的，如果我们每个人每天可以少用一双一次性筷子，一年下来就可以保留千万棵树木，看到这时，你还在放肆自己的行为吗?

我们再来看看那天空，蓝蓝的天不见了，白白的云也藏起来了，是真的没有了吗?不是的，它们只是被工厂排放的浓烟给“保护”起来了。

这些都是水造成的呢?都是我们人类自己，如果不乱砍伐树木、垃圾，合理排放净化过的污水，相信我们的地球就会很美。保护地球人人有责，让我们一起来保护环境吧!

One day, the fawn to another forest to take a walk. The fawn surprised to think: "hey, how do the trees here only the stumps, become bare?" Suddenly, the deer heard a cry, and it went down crying, the original small animals in the forest near the stump cry, cry very sad!

The deer walks to the small animals and ask: "why are you crying?" Little monkey and said: "the trees here grow CongCongLongLong, the branch is very tall and straight, we can free to play, play in the branches, now trees are being cut off, we didnt play place, let us how sport?" The words sound just fell, the small white rabbit said: "before we have the green grass, now has been cut off, havent got the fresh mushrooms on the grass, we have no food, how life ah!" At this moment, the bird to fly, said: "before the branches is our home, but now the branches have no, were homeless, told us how to live!"

Fawn looked up at the sky and prayed silently: "human! You dont hurt them, to help them quickly! Give them a happy peaceful home!"

有一天，小鹿到了另一个森林来散步。小鹿惊奇地想：“咦，这儿的树木怎么只有树桩，变得光秃秃的呢?”突然，小鹿听到一阵哭声，它顺着哭声走过去，原来森林里的小动物们在树桩旁哭泣，哭得可伤心了!

小鹿走到小动物们身旁，问：“你们为什么哭泣呀?”小猴说：“原来这儿的树木长得葱葱茏茏的，树枝很挺拔，我们就在树枝上自由自在地嬉戏、玩耍，可现在树木都被人们砍断了，我们没有嬉戏的地方了，让我们怎么运动呢?”话音刚落，小白兔说：“以前我们有绿油油的草地，现在被人们割掉了，草地上鲜嫩的蘑菇也没有了，我们没有了食物，怎么生活呀!”这时，小鸟飞来了，说：“以前树枝是我们的家，可现在树枝没有了，我们无家可归了，叫我们怎么活得下去啊!”

小鹿仰望着天空，默默地祈祷：“人类啊!你们不要再伤害它们了，快去帮助它们吧!还给它们一个幸福安宁的家园吧!”

my favorite animal is rabbit. its name is sweet. sweet has long ears. it’s very small. it’s white. it has a short tail. it has red eyes. it likes eating carrots. it likes jumping. it goes jumping three times a day. i like it very much. it’s lovely. it’s my best friend. i like the rabbit.

我最喜爱的动物是兔子。它的名字叫糖果。糖果有一对长耳朵。它长得又小又白，有一只短尾巴，一对红色的眼睛。它喜欢吃萝卜，喜欢蹦蹦跳跳的，一天能跳三次。我非常喜欢它。它特别可爱，它是我最好的朋友，我喜欢兔子。

星期六，天气晴朗，天空万里无云，一群鸟儿在树上叽叽喳喳地叫个不停，仿佛在唱着一曲曲动听的歌。这时，我看到有一只小麻雀停在我们的车子上。

爸爸急忙把小麻雀赶走，可是小麻雀还是一动不动地停在车子上。一会儿跳来跳去，爸爸就抓住了小麻雀，这时，我仔细地看了看这只小麻雀，它的羽毛还没有长全，还不太会飞，只能在车子上走来走去。我对爸爸说：“爸爸，你别抓呀!我们应该保护动物，不能伤害它们，这样是不对的。”说完，我听到树上的小麻雀不停地叫着，好像在说：“放了小麻雀，放了它!”于是，爸爸就轻轻地把小麻雀放在树枝上，让小麻雀自由自在地在大自然里生活。树上的麻雀们一看到我们把那只小麻雀放了，又叽叽喳喳地叫个不停，好像对我说：“你真是一个保护动物的好孩子。”

假如大自然没有动物，一切事物就没有生机，如果没有小草这些植物，食草的动物就生活不下去。从今天做起，保护动物，关爱生命，做一个大自然的小卫士。

Hello,everyone!My name is XX.I live in/at XX.I have a lot of hobbies,just like reading books,listening to the songs,surfing the Internet and so on.I major in XX.Some of my friends say I am outgoing,lovely and friendly.So,I like making friends in many ways.At home,I often help my parents do the housework,and they think they have a good kid.

We want to hold a green Olympic Games ,so everyone should do something

useful to protect the environment ,whether it is big or small.

We should do something to stop people from doing bad things to the

environment .We should put rubbish into dustbins instead of throwing it about.

Everyone must care for flowers ,grass and tress in public .We shound collect

things like paper ,plastic bags our neighborhood as well ,it’s necessary to

plant more trees every year .

It is everyone’s duty to make our neighborhood much better with our hands

minds .Let’s make a contribution to protecting the environment and the Plympic

Games successfully.

First should realize the importance of protecting endangered animals， to protect endangered animals and habitats， to promote the wildlife conservation and management of the laws and regulations 首要就应认识保护濒危动物的重要性，自觉保护濒危动物及其栖息环境，主动向亲友宣传野生动物保护管理的法律法规。 Second is to use the source of the endangered animals and do not eat， no， not keeping the source of the endangered animals or products， especially in the wild birds， turtles snakes and class 其次是拒绝利用野外来源的濒危动物，做到不吃、不用、不养野外来源的濒危动物或其产品，尤其是野生鸟类、蛇类和龟鳖类。 Last to be destroyed resolutely expose animal resources of the offence， for many endangered animal protection department or unit or fat， with the support of the animal protection administration 最后要坚决揭发破坏濒危动物资源的不法行为，用心为濒危动物保护部门或单位献计献策或捐资捐款，支持濒危动物保护管理工作。

Economic development and environmental protection are a pressing issue primarily for developing countries where, in trying to catch up with developed countries, they have to consume natural resources on an unprecedented scale. This has seriously polluted our environment and, with the global environmental campaign gaining momentum, many people in China call for the precedence of environmental protection over economic development.

Any attempt to pose economic development and environmental protection as diametrically contradictory is simple-minded. Since no country is willing to stop its economic development, the best way is to strike a balance between the two and to heighten the environmental awareness of those solely concerned with economic development.

European countries both economically developed and environmentally friendly can serve as perfect examples for China. Their success story in both undertakings illustrates that environmental protection does not mean a complete standstill of economic activities or exploitation of natural resources, but rather an active development and application of effective technologies to minimize environmental consequences. In Germany, environmental protection has become part of economic development as it boasts the world s most successful environmental industry. With a developed economy, we are well equipped to develop sophisticated technologies that can effectively safeguard our environment.

[英语作文：经济发展与环境保护

Is a source of atmospheric pollution, automobile exhaust emissions. The original day is blue sky thousands of miles, but now in some big cities, dark clouds, days groggy, and smelling the automobile exhaust, will be very uncomfortable, will also cause cancer. Car brought convenience to people, but also give a person come trouble exhaust. So I want to invent a kind of environmental protection car perfume exhaust.

This car far and general, approach can find the car without the exhaust pipe, only several honeycomb holes in the rear. People cant help but question, then the tail gas is how to deal with? What about the few at the back of the hole? The original automobile exhaust has been through in the car of a tube to trunk of a big box. The first small box of exhaust gas into the first big box, box spews disinfection powder, after disinfection of exhaust gas after a filter paper wall in the second small box, this small box also jet air disinfection, second after disinfection of exhaust gas through a filter paper wall come Chinese medicine steaming box. The box is full of Chinese traditional medicine powder, 4 walls exudes a of the heat and boil Chinese medicine Chinese traditional medicine. Three times after disinfection of exhaust gas after the thickest wall filter paper box to the perfume. Exhaust immediately into non-toxic harmless aroma, the aroma and then through the small hole at the back of the scattered outside the car, a series of disinfection purification is done.

[保护环境英文作文200字

Dear classmates,

As we know, some animals are dying out for various reasons. There is no doubt that animals are our friends. With World Animal Day coming near, what should we do to protect animals?

First of all, we should forbid people’s killing animals at random. Second, we should do all we can to protect animals’ living environment. With their living environment destroyed, the animals will become extinct sooner or later. Third, we should try our best to make everyone realize the importance of protecting animals. In a way, protecting animals means protecting ourselves.

Dear classmates, let’s start now and make every effort to protect animals—our good friends!

A tour guide is a person who leads groups of tourists around a town, museum, or other tourist attractions. The guide provides commentary on the features and history of the location. The tours can be from as little as 10-15 minutes to extended periods over many days. Such a person normally possesses a qualification usually issued or recognised by the appropriate authority.

When I travelled in Nanjing, Yangzhou and Suzhou last summer with my parents, an idea always ran into my mind that I could consider becoming an English tour guide some day. Yes, why not? Travel can broaden my mind, deepen my knowledge of the beautiful in China, even in the world.

If I can realize my dream, then personally I can enjoy the beautiful scenic spots for free and earn money and enrich my life, thus uplifting my life quality.

Protect environmental health and build a good home -- speech

The teachers! The classmates! Everybody is good! My topic today is "protecting the sanitation of the environment and building a beautiful homeland."

We live on earth, and the earths environment is protected by everyone. Head is LanYingYing day, is at the foot of green land, the majestic beauty of high mountain, the flow of water on the bottom, the tall green trees, the bright beautiful flowers, the earths favor of human is so beautiful environment, we can feel life here is very comfortable and happy, some people, however, not only protect the environment, also damage the environment, this is what a shameful act.

Currently, yichang is creating a national health city. There is no national health city in hubei province, but there are national health cities in the underdeveloped areas of the west. The city of yichang province, the world three gorges dam and ge zhou dam are located in yichang, the golden three gorges, the silver dam, the green yichang. The beauty of the mountain.

In the second half of last year, we started the "triple town" campaign and should start from me. Now the streets are littered with litter, spitting and scribbling. The dustmen tore up the rubbish ads, the people secretly taped up, and the people scrawled on the walls with paint, called the "psoriasis" of the street. These dirty and messy phenomena and to be governed.

The three orders of the state have led to the prevention and reduction of pollution and pollution, and the protection of air and environment. Now there are more and more cars, and the emissions are getting worse and worse. There are factories, sewage, pollution and water quality that directly harm crops and live life.

What is the benefit of this environmental destruction, and the destruction of the environment? Teachers, students, and to strengthen the awareness of environmental protection, improve their quality of civilization, actively join the "tri-cities lianchuang" activities, must start from me, starts from the minor matter, do a civilized, townsfolk hand in hand to build better homes!

When the Arctic Ocean freezes over in the autumn, polar bears set off in search of their favorite meals: fatty ringed seals and bearded seals. By the summer, the sea ice begins to melt and break apart. Deprived of access to the tasty seals, polar bears spend the summer fasting. At least, thats whats supposed to happen. As the planet warms, the warmer ice-free season is getting longer and longer. So whats a hungry bear to do?

Scientists once thought that polar bears might survive by supplementing their pinniped diet by turning to terrestrial foods like snow geese, their eggs and caribou.

"Weve had this debate in the literature about whether terrestrial foods are nutritionally relevant to polar bears during the on-land season when the ice has melted."

University of Alberta biologist Nick Pilfold.

"And weve known for a long time, going back to research in the early 70s, even going to back to early explorer logs, that polar bears will consume terrestrial based foods. But the debate was always whether those foods actually add up, energetically." In other words, do these substitutes provide enough nutrition to make up for the lost seals?

To find out, Pilfold and his colleagues estimated the weight lost each day by polar bears in the wilds of western Hudson Bay during the ice-free season, when they could ostensibly be chowing down on terrestrial foods. Then they compared that to the weight lost by bears that are temporarily held in Manitobas Polar Bear Alert Program.

While captive, the bears do not eat. They drop about one kilogram each day. But the wild bears, who had access to the Arctic snack bar, lost the same amount of weight each day. The results are in the journal Physiological and Biochemical Zoology.

"Which is really saying that the terrestrial foods do not have dense enough energy to offset the mass loss. So this idea that bears can just switch from eating sea ice–based food to land food and thats going to help supplement against longer ice-free seasons, that really doesnt show up in the data."

The problem is that polar bears evolved to rely on the marine diet.

"The food on land is protein and carbohydrate based, and the food the polar bears really focus on is fat. Fat is the name of the game for these bears; theyre highly adapted to absorbing that fat into their system and putting it onto their body as body mass, so they can fast on it later on. And the only thing thats going to provide them with that type of fat are marine mammals. And they can only access those marine mammals when theres sea ice."

Adult males can go eight months without food. But younger, sub-adult bears, which are no longer nursing and must hunt, cant last as long without sea ice. So as the Arctic warms, younger polar bears will disproportionately die out. Leaving the species survival in doubt.

北冰洋在秋季结冰以后，北极熊就会出发去寻求它们最喜欢的食物：富含脂肪的海豹和胡子海豹。海冰在夏季开始融化断裂。这使北极熊在夏季无法吃到美味的海豹，所以它们进入禁食期。至少，情况应该是这样。但是由于地球变暖，温暖的无冰季节越来越长。那饥饿的北极熊要怎么办?

科学家曾经认为，北极熊可能会转向陆地上的食物来补充它们对鳍足类动物饮食的需求，进而生存下去，这些陆地食物包括雪雁、雪雁蛋和北美驯鹿。

“文献中有过这类辩论，即在寒冷融化时陆地食物是否能满足北极熊的营养需求。”

尼克·皮尔福德是加拿大阿尔伯塔大学的生物学家。

“通过上世纪70年代初的研究，还有早期的探险者日志，我们很早以前就知道，北极熊会以陆地食物为食。但是辩论的焦点在于，这些食物是否能增加北极熊的能量。”换句话说，这些替代食物能否为北极熊提供足够的营养，弥补不能进食海豹带来的损失?

为了解开这个疑惑，皮尔福德及同事对西哈德逊湾荒野地区的北极熊在无冰季期间每天失掉的体重进行了估算，从表面上看，北极熊在这段时间食用了陆地食物。随后，他们将这一数据与通过马尼托巴北极熊预警计划暂时捕得的北极熊所失掉的体重进行了对比。

在被关期间，北极熊不吃东西。它们的体重每天大约下降1公斤。虽然野生北极熊能享用北极“小吃”，但是它们的体重每天也同样会下降1公斤。这一研究结果发表在《生理学和生化动物学》期刊上。

“显然结果表明，陆地食物不能为北极熊提供足以抵消大量损失的能量。所以，北极熊可以从食用海冰下面的食物转向食用陆地食物，并帮助它们对抗日益延长的无冰季这个观点，并没有在这项数据中得到证明。”

问题是，北极熊进化成了依靠海洋食物的动物。

“陆地食物以蛋白质和碳水化合物为基础，而北极熊需要的食物以脂肪为主。脂肪是这些熊真正需要的东西;它们高度适应的情况是，将脂肪吸收进它们的系统中，然后把这些脂肪放在身上以增加体重，这样它们之后就可以依靠这些脂肪来度过禁食期。唯一能提供给北极熊这种脂肪的就是海洋哺乳动物。但是它们只能在有海冰时食用到这些海洋哺乳动物。”

成年北极熊可以8个月不进食。但是小一些的未成年北极熊已经不再被哺育，它们必须要去猎食，可是它们不能在漫长的无冰季期间一直不进食。所以，随着北极地区变暖，较小的北极熊将会大批死亡。这使这些物种的生存成为问题。