Lately, it's felt like technological change has entered an incredible speed. Companies like OpenAI and Google have unveiled new Artificial Intelligence systems with incredible capabilities, making what once seemed like science fiction an everyday reality. It's an era that is raising big, existential questions for us all, about everything from the future of human existence to the future of human work.

"Things are changing so fast,"says Erik Brynjolfsson, a leading, technology-focused economist based at Stanford University. As he notes, this new wave of technological change looks like it could be pretty different. Unlike before, experienced and skilled workers benefited mostly from AI technology. In this new wave, it's the less experienced and less skilled workers who benefit the most."And that might be helpful in terms of closing some of the inequality that previous technologies actually promoted," Brynjolfsson says. So one benefit of intelligence machines is-maybe-they will improve the know-how and smarts of low performers, thereby reducing inequality.

But it's also possible that Al could lower the profit of the experienced, smart, or knowledgeable ones.AI could reduce inequality by bringing the bottom up, and it could also reduce inequality by bringing the top and middle down.

Of course, as Erik put, it's also possible that Al could end up increasing inequality even more. For one, it could make the Big AI companies, which own these powerful new systems, wildly rich. It could also empower business owners to replace more and more workers with intelligent machines. And it could kill jobs for all but the best of the best in various industries, who keep their jobs because maybe they're superstars or because maybe they have seniority.

The effects of AI, of course, are still very much being studied and these systems are evolving fast, so this is just an assumption. This machine intelligence could upend much of the previous thinking on which kinds of jobs will be affected by automation.

Like most of us, I try to be mindful of food that goes to waste. The arugula (芝麻菜) was to make a nice green salad, rounding out a roast chicken dinner. But I ended up working late. Then friends called with a dinner invitation. I stuck the chicken in the freezer. But as days passed, the arugula went bad. Even worse, I had unthinkingly bought way too much; I could have made six salads with what I threw out.

In a world where nearly 800 million people a year go hungry, "food waste goes against the moral grain," as Elizabeth Royte writes in this month's cover story. It's jaw-dropping how much perfectly good food is thrown away — from "ugly" (but quite cat able) vegetables rejected by grocers to large amounts of uneaten dishes thrown into restaurant garbage cans.

Producing food that no one eats wastes the water, fuel, and other resources used to grow it. That makes food waste an environmental problem. In fact, Royte writes," if food waste were a country, it would be the third largest producer of greenhouse gases in the world. "

If that's hard to understand, let's keep it as simple as the arugula at the back of my refrigerator. Mike Curtin sees my arugula story all the time — but for him, it's more like 12 boxes of donated strawberries nearing their last days. Curtin is CEO of DC Central Kitchen in Washington. D.C., which recovers food and turns it into healthy meals. Last year it recovered more than 807, 500 pounds of food by taking donations and collecting blemished (有瑕疵的) produce that otherwise would have rotted infields. And the strawberries? Volunteers will wash, cut, and freeze or dry them for use in meals down the road.

Such methods seem obvious, yet so often we just don't think. "Everyone can play a part in reducing waste, whether by not purchasing more food than necessary in your weekly shopping or by asking restaurants to not include the side dish you won't eat." Curtin says.

Keeping plants at home is a healthy and comfortable way of life. The following houseplants can create a most beautiful piece of green for your home.

Bird's Nest Fern (蕨)

The bird's nest fern is a good choice for anyone with a house that wouldn't support sun-loving species. It's a hardy fern variety adapting to living on forest floors, where the air tends to be cool and damp. It likes to be misted as well, but this doesn't always mean you need a misting bottle—spraying (喷洒) it in the sink or hanging it near a shower often works as well.

Chinese Money Plant

This is a flowering species that might be most appropriate for experienced plant gardeners looking for a new challenge. It prefers a moderate amount of indirect light, and tends to dry out slightly between watering sessions. It produces new plants easily without any input, directly from its root system. These can coexist in the same pot for a time.

Resurrection Plant

This native of the Mexican desert has adapted to surviving in extreme drought by curling (蜷缩) into a ball and remaining in seemingly lifeless state for years, if necessary. In this form, it can be transported by the wind across the dry landscape to areas with water. It will revive within hours in a shallow bowl of water, unfolding and transforming into a fresh and green moss (苔藓).

Snake Plant

This is a striking houseplant that can be an especially good option for new plant owners who you might not trust to keep a plant alive. It grows happily in almost any condition. While it prefers bright light, it doesn't mind shade or even artificial light. Plus, thanks to its thick, fleshy leaves, it stores water with remarkable efficiency, which makes it survive without water in the earth.