1 . We may think we're a culture that gets rid of our worn technology at the first sight of something shiny and new, but a new study shows that we keep using our old devices(装置) well after they go out of style. That’s bad news for the environment — and our wallets — as these outdated devices consume much more energy than the newer ones that do the same things.

To figure out how much power these devices are using, Callie Babbitt and her colleagues at the Rochester Institute of Technology in New York tracked the environmental costs for each product throughout its life — from when its minerals are mined to when we stop using the device. This method provided a readout for how home energy use has evolved since the early 1990s. Devices were grouped by generation — Desktop computers, basic mobile phones, and box-set TVs defined 1992. Digital cameras arrived on the scene in 1997. And MP3 players, smart phones, and LCD TVs entered homes in 2002, before tablets and e-readers showed up in 2007.

As we accumulated more devices, however, we didn't throw out our old ones. "The living-room television is replaced and gets planted in the kids' room, and suddenly one day, you have a TV in every room of the house," said one researcher. The average number of electronic devices rose from four per household in 1992 to 13 in 2007. We're not just keeping these old devices — we continue to use them. According to the analysis of Babbitt's team, old desktop monitors and box TVs with cathode ray tubes are the worst devices with their energy consumption and contribution to greenhouse gas emissions（排放）more than doubling during the 1992 to 2007 window.

So what's the solution（解决方案）? The team's data only went up to 2007, but the researchers also explored what would happen if consumers replaced old products with new electronics that serve more than one function, such as a tablet for word processing and TV viewing. They found that more on-demand entertainment viewing on tablets instead of TVs and desktop computers could cut energy consumption by 44%.

2 . In our information-driven society, shaping our worldview through the media is similar to forming an opinion about someone solely based on a picture of their foot. While the media might not deliberately deceive us, it often fails to provide a comprehensive view of reality.

Consequently, the question arises: Where, then, shall we get our information from if not from the media? Who can we trust? How about experts- people who devote their working lives to understanding their chosen slice of the world? However, even experts can fall prey to the allure of oversimplification, leading to the “single perspective instinct” that hampers (阻碍) our ability to grasp the intricacies (错综复杂) of the world.

Simple ideas can be appealing because they offer a sense of understanding and certainty. And it is easy to take off down a slippery slope, from one attention-grabbing simple idea to a feeling that this idea beautifully explains, or is the beautiful solution for, lots of other things. The world becomes simple that way.

Yet, when we embrace a singular cause or solution for all problems, we risk oversimplifying complex issues. For instance, championing the concept of equality may lead us to view all problems through the lens of inequality and see resource distribution as the sole panacea. However, such rigidity prevents us from seeing the multidimensional nature of challenges and hinders true comprehension of reality. This “single perspective instinct” ultimately clouds our judgment and restricts our capacity to tackle complex issues effectively. Being always in favor of or always against any particular idea makes you blind to information that doesn’t fit your perspective. This is usually a bad approach if you would like to understand reality.

Instead, constantly test your favorite ideas for weaknesses. Be humble about the extent of your expertise. Be curious about new information that doesn’t fit, and information from other fields. And rather than talking only to people who agree with you, or collecting examples that fit your ideas, consult people who contradict you, disagree with you, and put forward different ideas as a great resource for understanding the world. If this means you don’t have time to form so may opinions, so what?

Wouldn’t you rather have few opinions that are right than many that are wrong?

6 . Pollution

Pollution happens when the environment is dirtied, by waste, chemicals, and other harmful substances(物质).Pollution is a problem all over the world. But it is especially bad in large cities with a lot of industries and cars.    1    

Wildfires, volcanoes, and industrial chemicals cause some air pollution. But most air pollution comes from burning fossil fuels (矿物燃料）These include coal, oil and natural gas. The burning of fossil fuels may release harmful gases. Air pollution may cause such diseases cancer and asthma. It also leads to polluted rain that can harm living things    2     Finally, air pollution damages the ozone layer(臭氧层)which is important because it protects Earth against harmful rays from the sun.

Causes of water pollution are easy to see. People dump(倾倒) garbage and dirty water into river, lakes and oceans. Factories or cities sometimes release poisonous chemicals, and other wastes into water. These chemicals may make the groundwater unfit to drink.    3    

Littering, or throwing garbage on the ground, is a form of land pollution. Litter can destroy the habitats of plants and animals. The buildup of dangerous chemicals in the ground is another form of land pollution. The chemicals may come from farms or factories.    4     They may even harm people who eat the polluted plants and animals.

Many governments, environmental groups, and ordinary people are working to control pollution. Governments have passed laws to keep people from releasing dangerous chemicals into the environment     5     Instead they are getting power from the sun, wind, water, and other energy sources to produce less pollution. Many communities use recycling to reduce pollution.

7 . If you’re reading this, it’s safe to assume you arrived by internet.

Maybe you caught the headline as it raced by on Twitter. Or you might be taking a break from watching a boring movie on Netflix.

It doesn’t matter. Because according to a new study, it all adds up to the same thing: one distraction（分心的事情）after another.

And the thing is, they’re welcome distractions. Because, as the research — published this week in the Journal of Personality and Social Psychology — notes, people will do just about anything to avoid being left to their own thoughts.

For their study, researchers designed a sample test for more than 2,557 participants in 11 countries. They divided their test subjects into two groups. In the first group, people were asked to spend 10 to 15 minutes “entertaining themselves with their thoughts as best they could.”

Just sit back and think about things. Sounds good, doesn’t it? Well, not really. The second group — the one where people were told to surf the Net, play a video game, or even read a book — reported having much more fun. They scored more highly on entertainment and lower on boredom. And the preference for distraction seemed to be a global phenomenon, which may come as a surprise to Italians who are famously brilliant at doing nothing.

“The preference for doing external（外部的）activities such as reading, watching TV, or surfing the internet rather than ‘just thinking’ appears to be strong throughout the world,” the researchers note in the study.

But there does seem to be an important thing that hasn’t been included in the study. Shouldn’t the quality of thoughts matter? If you’ve got something positive to think about — say, how you’re going to spend your vacation or the great screenplay you’ve already half-written in your head — why are you reading this?

On the other hand, if you are always bothered by negative thoughts — a sad or painful experience, perhaps — by all means, keep scrolling（翻网页）.

Unfortunately, we won’t be able to take up much of your time here; it’s a short study that gets to the point in a hurry. Don’t worry though. There’s a whole world of distractions out there. Say, have you seen that ship teetering at the brink of Niagara Falls? And how about those charming cows? Bet you didn’t know they could smell you from six miles away.

And that’s something to think about.

I’m sorry to know that your best friend and you broke up over a small thing, for which you feel regret.

All the best.

Yours,

Li Hua