1 . Steven Stein likes to follow garbage trucks. His strange habit makes sense when you consider that he’s an environmental scientist who studies how to reduce litter, including things that fall off garbage trucks as they drive down the road. What is even more interesting is that one of Stein’s jobs is defending an industry behind the plastic shopping bags.

Americans use more than 100 billion thin film plastic bags every year. So many end up in tree branches or along highways that a growing number of cities do not allow them at checkouts(收银台). The bags are prohibited in some 90 cities in California, including Los Angeles. Eyeing these headwinds, plastic-bag makers are hiring scientists like Stein to make the case that their products are not as bad for the planet as most people assume.

Among the bag makers’ argument: many cities with bans still allow shoppers to purchase paper bags, which are easily recycled but require more energy to produce and transport. And while plastic bags may be ugly to look at, they represent a small percentage of all garbage on the ground today.

The industry has also taken aim at the product that has appeared as its replacement: reusable shopping bags. The stronger a reusable bag is, the longer its life and the more plastic-bag use it cancels out. However, longer-lasting reusable bags often require more energy to make. One study found that a cotton bag must be used at least 131 times to be better for the planet than plastic.

Environmentalists don’t dispute(质疑) these points. They hope paper bags will be banned someday too and want shoppers to use the same reusable bags for years.

What does the word “headwinds” in paragraph 2 refer to?

2 . Steven Stein likes to follow garbage trucks. His strange habit makes sense when you consider that he’s an environmental scientist who studies how to reduce litter, including things that fall off garbage trucks as they drive down the road. What is even more interesting is that one of Stein’s jobs is defending an industry behind the plastic shopping bags.

Americans use more than 100 billion thin film plastic bags every year. So many end up in tree branches or along highways that a growing number of cities do not allow them at checkouts(收银台). The bags are prohibited in some 90 cities in California, including Los Angeles. Eyeing these headwinds, plastic-bag makers are hiring scientists like Stein to make the case that their products are not as bad for the planet as most people assume.

Among the bag makers’ argument: many cities with bans still allow shoppers to purchase paper bags, which are easily recycled but require more energy to produce and transport. And while plastic bags may be ugly to look at, they represent a small percentage of all garbage on the ground today.

The industry has also taken aim at the product that has appeared as its replacement: reusable shopping bags. The stronger a reusable bag is, the longer its life and the more plastic-bag use it cancels out. However, longer-lasting reusable bags often require more energy to make. One study found that a cotton bag must be used at least 131 times to be better for the planet than plastic.

Environmentalists don’t dispute(质疑) these points. They hope paper bags will be banned someday too and want shoppers to use the same reusable bags for years.

3 . For Canaan Elementary’s second grade in Patchogue, N.Y., today is speech day, and right now it’s Chris Palaez’s turn. The 8-year-old is the joker of the class. With shining dark eyes, he seems like the kind of kid who would enjoy public speaking.

But he’s nervous. “I’m here to tell you today why you should … should…” Chris trips on the “-ld,” a pronunciation difficulty for many non-native English speakers. His teacher, Thomas Whaley, is next to him, whispering support. “…Vote for …me …” Except for some stumbles, Chris is doing amazingly well. When he brings his speech to a nice conclusion, Whaley invites the rest of the class to praise him.

A son of immigrants, Chris stared learning English a little over three years ago. Whaley recalls (回想起) how at the beginning of the year, when called upon to read, Chris would excuse himself to go to the bathroom.

Learning English as a second language can be a painful experience. What you need is a great teacher who lets you make mistakes. “It takes a lot for any student,” Whaley explains, “especially for a student who is learning English as their new language, to feel confident enough to say, ‘I don’t know, but I want to know.’”

Whaley got the idea of this second-grade presidential campaign project when he asked the children one day to raise their hands if they thought they could never be a president. The answer broke his heart. Whaley says the project is about more than just learning to read and speak in public. He wants these kids to learn to boast (夸耀) about themselves.

“Boasting about yourself, and your best qualities,” Whaley says, “is very difficult for a child who came into the classroom not feeling confident.”

7 . Before AI becomes a threat to humanity, the international community should reach an agreement on the role it is to play. More importantly, related laws and regulations must ensure that AI will benefit society and prevent it from threatening human life. Robots, for example, are believed to develop emotional intelligence sometime, which enables them to recognize, understand and express emotions in a way that is similar to humans, but we must avoid AI copying human emotions. Without legal restrictions, AI may become a social disaster.

The AI-driven new industrial revolution is irreversible. This, like previous ones, which introduced changes that had been unimaginable before, will certainly affect human employment. But it always turned out humanity was able to adapt to each industrial revolution and create new forms of employment. Therefore, it’s unnecessary to worry AI will replace our jobs. While technology advances at a rapid pace, what we need to do is to welcome the AI era rather than block its unfolding for fear of the unknown.