Rhinos once lived throughout Eurasia and Africa but now are only found in very small parts of Asia and Africa. There are many false beliefs that a rhino horn can cure medical problems. Every year in Africa, hundreds of rhinos are killed for their horns. The horn is usually cut so deep that the rhino is left to bleed to death. So, environmentalists cut off the rhino horn, leaving behind just a small amount to prevent the animal being killed for the horn. However, many hunters will kill a rhino for that small remaining stump. Very soon, rhinos are dying out. But why should we care about this? Rhinos are far away from us.

The World Wild life Fund(WWF) argues that we should set aside reserves to protect rhinos, as well as animals and plants that live in the same areas. Rhinos are one of the most popular animals that people go to Africa to see. It is the same with pandas in China. Many people especially visit China to see the pandas, which is good for the economy of these areas. In addition, they have increased the status of China in the world as people are impressed with the work that the Chinese are doing to save their wildlife.

But beyond these practical and economic reasons that benefit humans, there is another argument for saving animals from extinction. This argument is based on the animals themselves—every animal, however small or seemingly insignificant, is interesting, unique and beautiful in its own way. They are deserving protection, even if it means that humans lose areas in which to live and farm.

However, there is a new way of thinking about protection. That is, we can't take care of ourselves without also protecting nature. In specific situations we might choose to favor man and, in others, nature, but overall, we have to protect both. Because it's not just a matter of the direct goods that ecosystems offer us. Instead, it's about seeing the needs of human society and wild ecosystems as inseparable. This view is called “nature and people”.

Portugal’s white storks (鹳) were once a migratory bird (候鸟), known to leave the area each winter to travel to Africa’s warmer climate, but recently they have been staying put.

Surprisingly, though, the storks’ number has actually been on the rise. There are now thought to be more than 14,000 birds in Portugal in winter — a ten-time increase over the last 20 years. Any unusual change of an animal’s natural behavior often has negative influences.

It has been thought that their increase has a close relationship with a growing number of landfill sites (垃圾填埋场) in the area, providing the birds with a supply of fatty and dirty rubbish to eat, including junk food. Was it the junk food that stopped them migrating, or is Europe’s warming climate to criticize? Researchers sought to figure out exactly why their natural behavior had changed in this way. To understand, a team kept an eye on 48 white storks by equipping them with small GPS computers, which recorded their movements five times a day, checking how often they traveled to landfill sites as well as how fast they flew.

The conclusions were shocking. The birds also established more homes next to landfill sites — the team said that 80% of white storks were spending most of their time by the rubbish all year round, according to the results. The storks eat almost anything. “Every time after a truck with rubbish came, they collected what they could,” says Aldina Franco of the University of East Anglia in the UK. The storks have even been known to eat plastic, including old computer parts. “Really what they are trying to get at is rubbish that we throw away... like hamburgers, burnt meat and fish,” said Franco.

This rich and colorful supply of food will soon become hard to find, though, as new laws from European Union (EU) order that waste food be recycled. Open-air landfills will also be replaced by covered equipment, which birds will not be able to eat.

The white storks therefore face an uncertain future. Will they migrate to Africa as they had done for hundreds of years before, or will they stay put? No one knows. “I wonder what the Portuguese storks will do once the landfill sites are all closed, and we are going to continue to watch these storks and see how they will respond to the changes,” said Aldina Franco.

CLIMATE CHANGE REQUIRES THE WORLD’S ATTENTION

We have known about climate change for decades. There is little doubt that Earth is getting warmer and warmer (see the graph). A warming ocean and atmosphere along with melting ice and rising sea levels provide evidence of a dramatic change in the global climate.

In 2013, a lot of people were shocked by a news photo of a dead polar bear that was found on Norway’s Arctic island of Svalbard. According to the scientists who found its dead body, all that remained of the polar bear was “skin and bones”. An expert who has studied polar bears for many years said that from the position of its dead body, the bear appeared to have starved and died. Experts claimed that low sea-ice levels caused by climate change meant the bear could not hunt seals as before, so it had to travel greater distances in order to find food. This alarming case showed how the increase in temperature had an impact on Earth’s ecology.

Then what is causing the increase in the global average surface temperature? Climate scientists often mention a key climate process called the “greenhouse effect”, which has two common meanings: the “natural” greenhouse effect and the “man-made” greenhouse effect. The “natural” greenhouse effect refers to the fact that heat from the sun enters the atmosphere and warms Earth’s surface as short-wave radiation. The heat is released back into space at longer wave lengths. Greenhouse gases in the atmosphere, such as methane and carbon dioxide, trap some of the heat, keeping Earth’s climate warm and habitable. Without this process, Earth could not sustain life. However, the “man-made” greenhouse effect has now become a big problem. When people produce huge amounts of extra greenhouse gases by burning fossil fuels, more heat energy is trapped in the atmosphere and causes Earth’s surface temperature to rise quickly.

There is strong and comprehensive evidence that the rise in temperature has led to an increase in extreme weather and natural disasters worldwide, not only causing serious damage, but also costing human lives. Climate scientists have warned that if we do not take appropriate actions, this warming trend will probably continue and there will be a higher price to pay. In fact, news reports are frequently broadcast about extreme rainstorms and heatwaves causing deaths and economic losses.

Continued greenhouse gas emissions will result in further warming and long-lasting changes to the global climate. This requires the attention of people all over the world. Governments need to consider making policies and taking appropriate actions and measures to reduce greenhouse gas emissions. We as individuals can also reduce our “carbon footprint” by restricting the amount of carbon dioxide our lifestyles produce. It is our responsibility to seize every opportunity to educate everyone about global warming, along with its causes and impacts, because this is the most serious issue affecting all of us on this planet. So what will you do to help?