1 . Wildlife conservation is the practice of protecting plant and animal species and their habitats. As part of the world’s ecosystems, wildlife provides balance and stability to nature’s processes. Wildlife conservation is aimed to ensure the survival of these species and educate people on living sustainably with other species.

The number of people has grown to more than eight billion today, and it continues to rapidly grow. The economic growth endangers the habitats and existence of various types of wildlife around the world, particularly animals and plants that may be displaced for land development, or used for food or other human purposes. This threat is at top of the list and means natural resources are being consumed faster than ever by the billions of people on the planet. The introduction of invasive species from other parts of the world is another threat to wildlife. Other threats include climate change, pollution, fishing and hunting.

International organizations like the World Wildlife Fund, Conservation International, Wildlife Conservation Society and the United Nations work to support global animal and habitat conservation on many different fronts. They work with the government to establish and protect public lands, like national parks and wildlife protection areas. They help write legislation(法规), such as the Endangered Species Act(ESA)of 1973 in the United States, to protect various species. They work with law enforcement to charge those with wildlife crimes. They also promote biodiversity to support the growing human population while preserving existing species and habitats.

National Geographic Explorers, like conservation biologists Camille Coudrat and Titus Adhola, are working to slow the extinction of global species and protect global biodiversity and habitats. Environmental filmmakers and photographers, like Thomas P. Peschak, are essential to conservation efforts as well, documenting and bringing attention to endangered wildlife all over the world.

3 . Damon Carson must have one of the most interesting inboxes in the world. On any given day, in his office in Denver in the western US state of Colorado, he will field numerous inquiries from people looking to unload things. We’re not talking about someone trying to dispense with an old refrigerator or some out-of-fashion clothing, but companies.

Picture large companies looking to unload massive amounts of waste that would otherwise go to the landfill.

For example, Carson got a request from a battery company to deal with 22 tonnes of barium sulfate (硫酸钡) used in lead-acid batteries. A load of plastic garbage cans from a discount store were just waiting for him to repurpose them. And a recreation company wanted to know if Carson was interested in 360 kilograms of blue ropes, which they no longer needed to make the handles on coolers.

“They don’t want to just throw the waste away,” he explains. “Nor should they. Because it has value.” He is a matchmaker of the never-ending waste stream, trying not to pair people with people, but things with people. For nearly a decade, his company, Repurposed Materials, has been involved in this business. He’s not looking to recycle the things he gets-breaking them down to make something new-but rather finding a second life for cast-off goods in their original forms.

Once working in construction, Carson was familiar with an almost everyday phenomenon. “You’d open up one of these big construction dumpsters (大垃圾桶) and things would start falling out,” he says. He would find perfectly good windows still covered with plastic from the factory. “You can’t wrap your mind around how wasteful America is until you run a waste company,” he says. He began thinking about creating a sort of secondhand hardware store that would sell unwanted materials and keep them out of the waste stream. Then, in 2010, a business was born.

6 . On Sunday, Ecuador held a special vote on whether oil drilling (钻探) should be allowed in Yasuni National Park. The vote was part of a larger election to choose the country’s next president. Nearly 60% of Ecuadorian voters chose to protect the park.

In 2007, to protect the area, Rafael Correa — Ecuador’s president at the time — offered to leave the oil in the ground. In exchange, he wanted the rest of the world to pay Ecuador $3.6 billion. Though Mr. Correa worked hard to find support for his idea, no group offered to pay the money.

In 2016, Ecuador’s state oil company, Petroecuador, began drilling in Yasuni. The company is drilling in a fairly small area known as Block 43. Block 43 makes up far less than 1% of the park, but it produces about 55,000 barrels of oil every day.

But the drilling has upset many people in Ecuador. Yasunidos is a group which works to protect the park. For over ten years, Yasunidos has worked to allow Ecuador’s people a chance to vote on oil drilling in Yasuni. In May, Yasunidos won a court case that allowed them to put the Yasuni drilling up for a vote.

On Sunday, voters were asked if they supported oil drilling in the park or were against it. When the votes were counted, about 59% of the voters chose to stop drilling in Yasuni. Just 41% supported it.

Yasunidos called the vote “a historic success for Ecuador and for the planet!” But the result is a disappointment for Ecuador’s president, Guillermo Lasso. He believes the oil money is extremely important for the country. Selling oil from Yasuni brings in about $1.2 billion a year.

The government won’t be able to ignore or change the results of the vote, and will now have about a year and a half to end the drilling. Petroecuador says it will cost about $500 million to stop drilling and clean up the operation.

7 . Scalloped hammerhead sharks (扇贝锤头鲨) hold their breath to keep their bodies warm while they’re diving into cold water, a study has found.

Researchers from the University of Hawaii knew that scalloped hammerhead sharks do deep dives at night. They assumed that the sharks dove to hunt, since they had found deep-water squid (乌贼) in the stomachs of some sharks. However, hammerheads are cold-blooded, which means their temperature is controlled by their environment rather than their bodies. Getting very cold affects how well the animals’ brains and muscles can work. With temperatures in the deep ocean as low as 41°F(about 5°C), the scientists were confused as to how the sharks could do these deep dives and come back unharmed. To find out more, scientist Mark Royer and his team caught three hammerhead sharks. They attached instruments to the sharks’ fins (鳍) in order to take the temperature of the water and record the sharks’ speed and movements. The instruments showed that the sharks dove to about 2, 600 feet below the surface. However, the animals’ body temperature didn’t drop until they started to return to the surface of the water. The scientists think they might be able to explain why.

Like most fish, sharks get their oxygen from water, which washes through gills (鳃) on the side of their heads. Inside the gills, lots of blood vessels absorb oxygen from the water. Because blood temperature affects body temperature, the gills are the area in which the shark is most likely to lose heat. Royer said that if the deep-diving sharks didn’t get cold, they must have closed their gills. In other words, they were holding their breath as they dove, just like humans do when they swim underwater.

Video footage of a shark swimming more than 3, 000 feet deep with closed gills seems to prove the theory. Other scientists want to study the question more closely, however, because fish’s bodies aren’t usually adapted to hold their breath. Royer called the finding a “complete surprise”.

8 . Coral reefs in Florida have lost an estimated 90% of their corals in the last 40 years. This summer, a marine heat wave hit Florida’s coral reefs. The record high temperatures created an extremely stressful environment for the coral reefs, which are currently also experiencing intense coral bleaching (白化).

A coral is an animal, which has a symbiotic relationship with a microscopic algae (藻类). The algae gets energy from the sun and shares it with the coral internally. The coral builds a rock-like structure, which makes up most of the reef, providing homes and food for many organisms that live there. Coral bleaching is when the symbiotic relationship breaks down. Without the algae, the corals appear white because the rock skeleton becomes visible. If the bleaching continues for an extended period, the corals can starve to death without the energy.

Florida is on the front lines of climate change. It is also on the cutting edge of restoration science. Many labs, institutions and other organizations are working nonstop to protect and maintain the coral reefs. This includes efforts to understand what is troubling the reef, from disease outbreaks to coastal development impacts. It also includes harvesting coral spawn (卵), or growing and planting coral parts. Scientists moved many coral nurseries into deeper water and shore-based facilities during this marine heat wave. They are digging into the DNA of the coral to discover which species will survive best in future.

There are some bright spots in the story, however. Some corals have recovered from the bleaching, and many did not bleach at all. In addition, researchers recorded coral spawning. Although it’s not clear yet whether the larvae (幼虫) will be successful in the wild, it’s a sign of recovery potential. If the baby corals survive, they will be able to regrow the reef. They just have to avoid one big boss: human-induced climate change.

10 . There’s a reason why dogs are called man’s best friend. Dogs and cats make wonderful companions and provide many emotional and physical benefits.

The most obvious benefits of pet ownership are love and companionship. We feel especially secure with dogs and cats because of the unconditional love they provide.     1     Taking care of a dog or a cat can provide a sense of purpose and a feeling of being accepted.

    2     When you feel securely attached to this living being, there are biological brain effects that reduce stress response, so it may affect your breathing rate or blood pressure or anxiety level.

It’s not always easy caring for pets, however. Sometimes having them in the home poses safety threats for older adults. If you have problems with walking and stability and your pet can get under your feet or jump up and knock you over, then falls and broken bones are a real danger.     3     Animals carry all kinds of bacteria that can be transferred to humans. Dogs and cats can also cause allergic (过敏的) reactions in some pet owners.

Before getting a pet, consider if you’re physically and mentally able to care for it.     4     Do you have the energy and strength to feed it, play with it, and in the case of dogs, take it for daily walks? Do you have the financial means to pay for pet food and visits to the veterinarian (兽医)?

If you feel you have the mental, physical, and financial means to care for a pet, take the pet’s size into consideration — not too big and not too small. And consider the animal’s personality.     5