【推荐1】Just a year ago, the colors were bright under the waves. Now it’s gray — the Maldivian reef is dead. The coral is killed by the pressure of rising temperatures.

Coral reefs are areas underwater where small creatures live. The coral is hard material formed on the bottom of the sea by the skeletons of those creatures. But the world has lost about half its coral reefs in the last 30 years. Scientists are working to prevent their destruction. Due to global warming, over 90 percent of corals are expected to die by 2050. “To lose coral reefs is to fundamentally undermine the health of a very large proportion of the human race,” said Ruth Gates, director of the Hawaii Institute of Marine Biology.

Why are coral reefs important? Coral reefs support a fourth of all marine species, as well as half a billion people worldwide. They serve as barriers to protect coastlines from the storms. They provide billions of dollars from tourism, fishing and other trade. They are also used in medical research for cures for diseases. “Everyone should be concerned,” said biologist Ove Guldberg at Australia’s University of Queensland. “This is not just some distant dive destination. This is the basic structure of the ecosystem we depend on.”

The ocean is getting warmer. A rising temperature of just one to two degree Celsius can force coral to expel the algae (驱逐海藻) that live there. This leaves their white skeletons uncovered. It is a process called “bleaching”. Sixteen percent of the world’s corals died of bleaching in 1998. The problem has become much worse in recent years.

“We’ve lost 50 percent of the reefs, but that means we still have 50 percent left,” said Ruth Gates, who is working in Hawaii to breed corals that can better withstand increasing temperatures. She is also trying to “train” corals to survive rising temperatures. Gates says it is time to start “thinking outside the box”— find creative ways to help them.

【推荐3】The ice around Alaska is not just melting. It's gotten so low that the situation is endangering some people's food and jobs.

“The seas are extraordinary warm. It is affecting the ability for Americans in the area to put food on the table right now,” said University of Alaska climate expert Rick Thoman.

Ocean temperatures in the Chukchi and North Bering seas are nearly 5°C above normal, satellite data shows.

“The northern Bering and southern Chukchi Seas are baking. And there are immediate local and economic influences along the state's western and northern coastlines. Birds and sea animals are showing up dead and sea temperatures are warm enough to support algae (藻类) to grow rapidly, robbing sea animals of oxygen and sunshine.” he said.

Many coastal Alaska towns are facing dire situation since they depend on fishing to support their economy and feed people who live there.

“Much of what the people eat there comes from food they harvest themselves,” said Brian Brettschneider at the International Arctic Research Center. “If people can't get out on the ice to hunt seals or whales, that affects their food security. It is a human crisis (危机) of survival.”

The warming is a sure signal of a warming planet, according to Brettschneider.

“This event is unquestionably a reflection of our changing climate. And this year's conditions will have a lasting effect. These extraordinary warm waters will take a while to cool off as winter approaches, and later and thinner ice is expected in the coming winter.” he said.

“What is happening in coastal Alaska is what is coming in one sense for everybody else,” he said. “Most people are feeling the effects of climate change even if they don't know it. Changes are happening, and changes will be more obvious. ”

【推荐3】Scientists say a huge percentage of bird species are in danger because their habitats are disappearing.

The scientists studied the migration, or flight, paths, of almost 1,500 species and decided that 91 percent of them passed through dangerous areas. The major danger for migratory birds is development. Building and paving have covered over nature where birds stop and feed as they move from one part of the world to another.

For example, a bird called the bar-tailed godwit migrates from its breeding grounds in the Arctic. It flies all the way to Australia and New Zealand. The problem, according to investigators, is that many of these small birds die along their migration because they don't have a safe place to eat and rest. There is no place to restore their energy for the next part of their journey. "They simply perish along the way," says one of the scientists.

Countries in North Africa, Central Asia and those along the coasts of East Asia are having the most difficult time conserving land. The scientists say these countries do not have enough areas that are safe for birds.

"Our world gets poorer every time we lose a species,’’ one of the scientists says.

The researchers say countries need to work together and come up with safe stopover areas for birds that pass through their boundaries.

For example, one country might have preserved safe zones for migrating birds. But a neighbor country might not. A bird might die.

One scientist who is not involved in the report tells the Los Angeles Times that while some habitats are changing, more work can be done to make urban areas safe for birds. He says small changes—like planting more native plants or keeping cats out of areas birds would be likely to use—could make a big difference.

【推荐1】LONDON (Reuters)——Organic fruit, delivered right to the doorstep. That is what Gabriel Gold prefers, and he is willing to pay for it. If this is not possible, the 26-year-old computer technician will spend the extra money at the supermarket to buy organic food.

“Organic produce is always better,” Gold said, “The food is free of pesticides (农药), and you are generally supporting family farms instead of large farms. And more often than not, it is locally   grown and seasonal, so it is more tasty. ” Gold is one of a growing number of shoppers buying into the organic trend, and supermarkets across Britain are counting on more like him as they grow their organic food business. But how many shoppers really know what they are getting, and why are they willing to pay a higher price for organic produce? Market research shows that Gold and others who buy organic food can generally give clear reasons for their preferences—but their knowledge of organic food is far from complete. For example, small amounts of pesticides can be used on organic products. And about three quarters of organic food in Britain is not local but imported to meet growing demand. “The demand for organic food is increasing by about one third every year, so it is a very fast-growing market." said Sue Flock, a specialist in this line of business.

【推荐2】When he was 22, Rob Stewart traveled the world for four years. He wanted to call attention to the mistreatment of sharks. His 2007 film, Sharkwater, documents the cruel practice of removing sharks’ fins (鳍) for money and leaving the animals to die. In his latest documentary, Revolution, Stewart takes on an even bigger challenge: climate change.

The Canadian filmmaker says that climate change has harmed people and places everywhere: “It is stronger than any government or organization. If we educate people, they will make better decisions about protecting natural resources.”

According to a recent report on climate change, “The atmosphere and ocean have warmed, the amounts of snow and ice have reduced, and sea levels have risen.” These developments are endangering crops, wildlife, fish, and even people.

Stewart says that the consequences of climate change will be irreversible unless people take action, especially young people. “It’s up to kids to be the moral compass (道德指南) of society,” he believes, “and say, ‘Guys, this is not right.’”

Many kids took action after seeing Sharkwater. Elementary school students in the Northern Mariana Islands, for example, got their local government to ban the sale of shark fins.

Felix Finkbeiner, 17, of Germany, is also part of the “revolution” to save the planet. In 2007, Felix started a youth group called Plant-for-the-Planet, whose motto is “Stop Talking. Start Planting.” The group raises money to plant trees. So far, Plant-for-the-Planet has planted nearly 200 trees around the world. “Future generations are the ones who will be suffering the most from inaction (无作为),” Felix says. His goal is to plant millions of additional trees.

“When we started four years ago,” Felix tells Stewart in Revolution, “we thought we had to save the polar bear. We thought we had to save the environment. But soon after, we found out that it’s about our future, that we have to save our own future.”

【推荐3】My sister Alice and I have been trying to get people to stop dropping cigarette butts (烟头) for seven years. One day, we were walking in our hometown and saw hundreds of cigarette butts on the ground. They made the town look so ugly that we decided to start a group to make people stop dropping butts. We called it “No Butts About It”.

At first, we drew pictures with “The Earth is not your ashtray (烟灰缸)” written on them. We put the pictures around our hometown — in parks, on beaches, and along roads. We wanted to make people understand that dropping butts hurts the environment. Most smokers don’t think that dropping butts hurts the Earth. But it does, and all rubbish does!

Later, we wrote to companies and asked them for money to help us. We used the money to buy ashtrays and gave them to smokers. We wanted smokers to carry the ashtrays with them so they didn’t have to drop butts.

At the moment, we are trying to get cigarette companies to put an ashtray in each pack of cigarettes. Some companies want to do it. Many people have started to join our group since it began. Today there are 45 other “No Butts About It” groups in America.

Now there are even groups in England, Australia, and India! Many newspapers have written about my sister and me over the last seven years. And we have won many prizes for what we do. But we are not interested in prizes. We just want to make the Earth a better and cleaner place for animals, plants and people. One day, it will be.