【推荐2】previous recessions (经济衰退), billionaires were hit along with the rest of us; it took almost three years for Forbes’s 400 richest people to recover from losses caused in 2008’s Great Recession. But in the coronavirus recession of 2020, most billionaires have gotten richer than ever before.

Billionaires increased their new billions just as millions of other Americans ran into terrible financial problems. More than 20 million people lost their jobs at the start of the pandemic. Food banks across the country are preparing for another great increase in demand. Why are American billionaires doing so well while so many other Americans suffer? People may find part of the reasons from the following fact. Stocks (股票) are overwhelmingly owned by the wealthy, and the stock market has recovered from its early-pandemic depths much more quickly than other parts of the economy.

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【推荐3】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 That’s bad news for the environment — and our wallets — as these outdated devices consume much more energy than the newer ones that do the same things.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%.