文中应包含以下内容：
1.你是否支持动物表演；
2.你支持或反对的理由。
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The problem of electronic waste
We have gradually come to realise that in two ways in particular, modern hi-tech can be bad for the planet. The first is its energy use; the worldwide scale of information technology is so enormous that electronics now produce fully two percent of global carbon emissions, which is about the same as the highly controversial emissions of aeroplanes. The other is the hardware, when it comes to the end of its natural life. This, increasingly, is pretty short. We have hardly noticed this important stream of waste, so much so that a Greenpeace report on the untraced and unreported e-waste two years ago referred to it as “the hidden flow”. We need to be aware of it.
The latest United Nations Environment Programme (UNEP) report estimates that worldwide, electronic waste is mounting by about 40 million tons a year. So what can we do about it?
The European Union has recognised the problem by adopting a key principle: producer responsibility. In other words, making it the duty of manufacturers of electronic goods to ensure their safe disposal at the end of their lives. In practice, an EU regulation now means that electronics dealers must either take back the equipment they sold you, or help to finance a network of drop-off points, such as public recycling sites. Its main feature is quite ambitious: it aims to deal with “everything with a plug”.
The new UN report suggests that all countries could do something about the problem with a change in design. Groups such as Greenpeace have led the way in putting pressure on major manufacturing companies to find substitutes for the toxic chemicals inside their products. Encouragingly, they have had some success in forcing them to develop non-poisonous alternatives to these. This may be the real way forward.
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Caves are important in many areas of science. Earth scientists study how rock forms and changes in caves. Biologists visit caves, too, to learn about the unusual species that live in them.
However, caves are important for another reason. On the walls of some caves are paintings. They were made by people who lived thousands of years ago. Some of the earliest paintings, like the ones in EL Castillo Cave in Spain, are forty thousand years old. Some are outlines of hands or simple designs. Others show animals or people hunting. They were painted using natural red, orange, white and black minerals. These works of art connect us with people who lived long ago.
Interestingly, most of these cave paints were not found by scientists. They were found by people exploring caves for fun. For example, the cave paintings in Lascaux, France, were found in 1940 by a group of boys. They had no idea that the pictures they found on the walls of the cave were over seventeen thousand years old. Over the years, people have found these types of amazing paintings in sites all over the world.
You can explore these caves, too. Some have become very popular tourist sites. They are easy to visit and have underground tours for the public. However, exploring other caves can be more difficult. You must be careful, and you need to be prepared for cold, darkness and danger. And you might have to walk through mud or water. Dress warmly and bring special equipment, such as helmet with a light. But these underground worlds are so fascinating that it is worth the trouble.
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You still need a better reason to plant a tree?
Police aren’t cheap and neither are lawyers, judges, and all the other layers that make up the justice system. But trees and some grass, in comparison, are a real bargain, and they prove to be effective in lighting crimes.
Many cities used to launch programs to plant vegetation along roadways to help absorb rainwater. After tracking 14 types of crime in nearby areas, Michelle Kondo, a social scientist found that a variety of crimes including property crimes such as theft and burglary, and violent crimes such as armed fights and mayhem in those areas decreased to 27 percent, a stunning 18 percent fall. Kondo believed the appearance of city trucks and vans in the landscaped areas— for planting and maintenance— was enough to scare away potential criminals.
Kondo’s study also worked on the link between grassland care and decrease of the crime in downtown areas. It’s tempting to use income as the connection. After all, if you have the crime and money to water your lawn, you probably live in a neighborhood that sees less crime. But actually, people are less likely to hang in those areas where the streets are maintained or cleaned. “You will see less kids hanging on the corners.’’ Kondo said. He argued that caution of the local people implied by the organized greenery helped to frighten away ill-intentioned guys, by announcing to would-be criminals that there are “eyes on the street’’ that care for their neighborhood and would be more likely to report a crime.
We already know greenery is beautiful to look at and can help improve mood and health while reducing pollution. Now we can add crime-fighting to the list of vegetation’s many benefits. Therefore, are you ready to plant a tree?
