字幕列表 影片播放 列印英文字幕 Hey, I'm Carl Azuz. Today on CNN Student News, pollution around the world, a mirage that may be a mirage, and a ghastly ghostly drone. First up, an international trip by a Middle Eastern Leader. Syrian President Bashar al- Assad traveled to Moscow this week. Officials believe it's the first time that al- Assad has left Syria since its civil war started in 2011. He went to the Russian capital to meet with the man who's become his main sponsor, Russian President Vladimir Putin. Russian officials say the two leaders discussed working together to fight terrorist extremist groups. That's a term the Assad regime uses to describe anyone fighting the Syrian government. Russia says its military is in Syria, both to fight terrorism and to help the Syrian government to stay in power. In the four and a half years since the war in Syria began, the human rights group Amnesty International says 200, 000 people have been killed and that 11 million people, that's almost two- thirds of Syria's entire population, have been forced to flee their homes. Today's roll call starts near the Caribbean with the city in northwestern Venezuela, it's Maracaibo. And we found yesterday that the students of Escuela Bella Vista are watching there. Great to see you. Next we're moving north to north Georgia and flying with the Falcons of Flowery Branch High School. Hello to our viewers in Flowery Branch. And a little farther north in northeast Illinois, shout out to Elmwood Park High School. It's in Elmwood Park, not too far from Chicago. Ahead of a climate conference in Paris next month, the number of international officials are calling for a price on carbon. Carbon dioxide emissions are blamed for pollution worldwide. A carbon price or carbon tax would require certain organizations or businesses to pay a fee. The more carbon their projects give off, the more they'd have to pay. Supports say this would encourage countries to reduce their carbon emissions, to look for cleaner ways to make products and do business and to generate revenue that could be used to clean up the environment or research green technologies. But opponents of the idea say some businesses would simply move their operations to other countries where there isn't a carbon tax to avoid paying it. They also say it will be expensive to institute carbon taxes and carbon monitoring and that some corporations could cheat to get around the fees. CNN has reporters all around the world and several recently discussed ways to combat pollution in the cities where they work. We'll start in Hong Kong. I'm Ivan Watson in Hong Kong, where some of the city's 7 million residents are choking on the air they breathe. Cases of chest infection and asthma have soared in recent years. And the problem has caused more than 2, 600 premature deaths in 2014, according to a report by the University of Hong Kong, and cost the economy nearly $ 4 billion. Think tank, the Civic Exchange says 98 % of the worst pollutants in the citie's air come from commercial shipping and ferries. In July, Hong Kong introduced landmark new rules limiting the sulfur content of the diesel used by ships to half of one percent. And after a night full of that, a typical Delhi morning often looks like this. You can barely see more than a dozen feet ahead of you. Now trucks aren't allowed to ply these roads during the day, but cars are. And the sheer number of cars is a problem. Every day 1400 new cars join the 8. 5 million already on the streets here. The World Health Organization has labeled India's capital the most polluted city on the planet. Policymakers are beginning to react, with New Delhi's government trying out what it's calling a car- free day. Delhiites will be encouraged to leave their cars at home, and instead take public transport. One thing the government has been trying to do is boost renewable energy. Tokyo is one of the largest metropolitan areas in the world, with tens of millions of people, and the cars and the industry to go with it. And yet pollution here, not a very big problem. In fact, as compared to most other large Asian cities, Tokyo consistently ranks near or at the top of most air quality lists. But it hasn't always been this way, take the Sumida River for example. Clean now, it was dark with pollution back during Japan's industrial booms of the 50s and the 60s. It took decades of environmental reforms before the problem was largely solved by the mid- 1990s. As beautiful as Paris might be, there are some days when you could barely see the Eiffel Tower for the pollution. That's something the mayor of Paris has been intent on changing almost since the day she was elected. The city has taken a number of anti- pollution measures, including last July, a ban on older diesel powered trucks and buses from the streets of Paris, something that will be expanded over coming years to include newer models. But all this does not just have to do with health concerns. The world climate change conference begins here in late November, and a polluted Paris would not be the best image to present to the thousands of environmentalists who are expected to attend. I'm Diana Magnay in London. Now London's mayor Boris Johnson is making big changes to the city streets, in a bid to improve air quality. Starting off by cleaning up the bus fleets, he's brought 1300 new hybrid busses to this city's streets, with hundreds more expected next year. And he's also mothballing 6, 000 of the oldest most polluting black cabs. He also wants this whole city by 2020 to be the world's first ultra low emission zone and that means that if your car doesn't mach the right standards by then, you'll have to pay a fine when you drive through the center of town. See if you can ID me. I come from a French term meaning to be reflected. but I'm actually caused when light rays are refracted or bent. I'm the illusion of an object, like a lake in the distance, though it's not actually there at all. I'm a mirage and I can be seen in the desert, or at sea. Mirages and Fata Morganas are similar. They're both illusions, they're both related to the way light rays pass through layers of different temperatures. And they both fool us. Whether it's the oasis in the desert or a car appearing to float in the heat of the sun, these visual phenomena confuse the message between our eyes and our brain. This video surfaced out of China, and it looks like their city is floating in the clouds. Of course, we can't verify if the video is real or not, but we have seen things like this before. This is a type of superior mirage called a Fata Morgana, where air temperature at the surface is actually cooler than the air above. It can make objects appear like they are stacked on top of each other, or in this case, like a city floating in the clouds. The same phenomenon happens when you're driving in your car on a hot day and you see what appears to be water or something liquid on the road in the distance. Or you've heard of people walking through the desert and they see water in the distance and then once you get closer it disappears. Light waves travel through the atmosphere from the sun straight to your eye. But they actually travel through the atmosphere at different speeds. A mirage occurs when the temperature on the ground is hotter than the air above. When light travels through the cooler air into that warmer air near the ground, the light is refracted or bent. And what your eye is seeing is not that U- shaped bend, but an illusion. Maybe going out as a ghost isn't the most original Halloween idea. But it is if you're a drone. Look at this. A man in Arizona dressed up his drone as something spectacularly spooky. And just had it hover around the block for awhile, creeping out some cars. It took more effort in battery than just using a sheet with some eye holes cut out of it, and imagine what it would look like in the dark if you couldn't see the propellers. You might call that downright wraithful. But let's be transparent about this, now that someone's floated the idea, it might not fly with over protective parents who could give it a propeller take down. There's just a ghost of chance that they become ghost busters. I'm Carl Zeus, and we've got to ghost, but we hope you'll drift by tomorrow for more CNN Student News.