Diets have changed in China — and so too has its top crop. Since 2011, the country     1    （grow）more corn than rice. Corn production has jumped nearly 125 percent over     2     past 25 years, while rice has increased only 7 percent.

A taste for meat is     3     (actual) behind the change: An important part of its corn is used to feed chickens, pigs, and cattle. Another reason for corn's rise: The government encourages farmers to grow corn instead of rice     4     (improve) water quality. Corn uses less water     5     rice and creates less fertilizer(化肥) runoff. This switch has decreased     6     (pollute) in the country's major lakes and reservoirs and made drinking water safer for people.

According to the World Bank, China accounts for about 30 percent of total     7     (globe)fertilizer consumption. The Chinese Ministry of Agriculture finds that between 2005—when the government     8     (start) a soil-testing program     9     gives specific fertilizer recommendations to farmers - and 2011, fertilizer use dropped by 7.7 million tons. That prevented the emission(排放) of 51.8 million tons of carbon dioxide. China's approach to protecting its environment while     10     (feed) its citizens "offers useful lessons for agriculture and food policymakers worldwide." says the bank's Juergen Voegele.

4 . With greater climate catastrophe (气候突变) on Earth, it is natural for us to make every effort to stop the potential floods, snowstorms, and alarming reports from scientists. For many of us (myself included), part of that means running out to buy reusable straws, organic cleaners, and packaging-free products.

However, before you are delighted at “green” purchases, take a second to consider the results of a new study from Arizona University. By comparing the shopping habits, mental health and environmental impact of young people, the researchers reconfirmed a principle: Buying less beats buying “green” stuff without effort. And that is true whether you are looking at the impact that your purchases have on the Earth or on your own happiness.

It should not come as a shock that simply consuming less is better for the planet. After all, every new item a factory yields requires some resources to produce. Take plastic bag bans for instance. If your city is getting rid of single-use shopping bags, it can be attractive to pay for a fashionable organic cotton bag hanging in the check-out line of your local supermarket. However, experts insist that growing cotton is actually no better for the Earth than producing the conventional plastic bags. Then what is your best bet for carrying your groceries if you care about sustainability? Any bag you already own.

It is not just the Earth that will be happier if you buy less. You will feel more contented too, according to the new study. “People believe that they might well be self-satisfied about becoming environmentally conscious through ‘green’ buying patterns, but it doesn’t seem to be that way”, said the lead researcher Sabrina Helm. “Reduced consumption has effects on increased well-being, but we don’t see that with ‘green’ consumption.”

“Owning every new ‘green’ product on the market might make you feel contented, but if you relieve yourself of that burden of ownership, most people report feeling a lot better,” said Helm.

5 . I looked out of the door of my 100-year-old house and saw my newly built garden. I realized nothing is rubbish. I was full of joy and ___________.

I ___________ to look at the things in a different perspective that we usually think of as _________ —plastic bags, polluted water, rubber bands, and newspapers, clothes and furniture we ___________. I also began to think, act and live according to the belief that all things have the _________ of being reused as long as we try to _________ it. And I explored the worth of ___________. I mean recycling isn’t just about _________ rubbish like putting glass and paper in _________ bins. It also requires creativity, commitment and even love.

My neighbors would put the autumn __________ by the roadside to be picked up by the garbage truck. This didn’t __________ with my newfound concept of recycling trash, so I made a new ____________ with branches for moving boxes and put up a __________, saying, “Dump (倾倒) leaves here”. I watched carefully through the autumn as my neighbors __________ the leaves in my new garden and I also watered the grass __________ with rainwater and collected dogs’ waste as fertilizer. Then I __________ flower seeds. Finally, I had a new ____________ garden, full of colorful flowers.

Nothing has to be really __________. I even used my bath water to water my flowers, though it might be a little   __________ for my friends. But I think if we all can turn waste, sometimes a little dirty, into __________, the world will be a much better place.

China's online food delivery platform Ele.me has carried out a new service of picking up garbage from its users in Shanghai     1     July 2019.

The service comes after     2     recently-released regulation on waste management in Shanghai. Individuals     3     throw away their garbage without sorting it can be fined up to 200 yuan, while companies and     4     (organize) can face fines up to 5,000 yuan.

The trash taking service requires residents to sort     5     (they) own garbage before it     6     (pick) up by workers from Ele.me, who will ensure the waste is disposed of in the correct garbage bins.

It's obvious that this service is     7     (convenience) to the old, especially to the disabled customers.

However, many netizens on Sina Weibo don't think Ele.me is providing a wonderful service, saying it just wants     8     (make) money. They think 12 yuan for an order is too much.     9    , many more people doubt if these collectors will wash their hands after dealing     10     the trash.

8 . Prince William, second in line to the British throne, gave his first TED Talk on Saturday to launch his Earthshot Prize, a competition that will award five £ 1 million prize money every year for the next decade to those who can come up with solutions to environmental problems.

Any person, group or organization around the world is qualified, and any suggestion is welcome, so long as it is applicable globally. It could be a new technology, a new approach, a new governmental policy or any other ideas toward five environmental goals -fixing the climate, purifying the air, protecting nature, cleaning oceans and handling waste.

"Earthshot" was inspired by John F. Kennedy's "Moonshot," an ambitious 1961 mission to get a man on the moon within a decade. The purpose of the prize is partly to arouse excitement and offer what Prince William called “a bit of catalyst, a bit of hope, a bit of positivity" at a time when the world needs. The money will come from donors around the world. The prize committee includes many celebrities.

Prince William has environmental activism in his blue blood. Both his grandfather, and his father Prince Charles were active environmentalists. Prince William acknowledged his heritage by saying he had always listened, learned and believed what they were saying about the environment. Besides speaking wise words, he also puts forward a good prize. Over a million pounds is significantly more than a Nobel Prize and should inspire some serious and creative thinking about the difficulties of Planet Earth. Unlike the Nobel Prize money, the Earthshot money is supposed to be spent on the winning project. ^“If we achieve these goals, by 2030 our lives won't be worse, and we won't have to sacrifice everything we enjoy. Instead, the way we live will be healthier, cleaner, smarter, and better for all of us," he said.

9 . Sugar cane (甘蔗) contains around 10% sugar. But that means it contains around 90% non-sugar — the material known as bagasse (甘蔗渣) which remains once the sugar-bearing juice has been squeezed out of the cane. World production of cane sugar was 185m tonnes in 2017. That results in a lot of bagasse.

At the moment, most of this is burned. Often, it fuels local generators, so it is not wasted. But Zhu Hongli, a mechanical engineer at Northeastern University in Boston thinks it can be put to better use. "With a bit of improvement bagasse makes an excellent replacement for the plastic used for disposable food containers such as coffee cups," says Dr. Zhu.

Dr. Zhu is not the first person to have this idea. But previous attempts tended not to survive contact with liquids. She thought she could overcome that by combining the bagasse pulp (浆状物) with another biodegradable (可生物降解的) material. She discovered that the main reason past efforts failed is that bagasse is composed of short fibres which are unable to give resilience (韧性) to the finished product. She therefore sought to insert a suitably long-fibred substance.

Bamboo seemed to fit the bill. It grows quickly, degrades readily and has appropriately long fibres. When the researchers mixed a small amount of bamboo pulp into bagasse, they found that the short and long fibres combined with each other closely.

To put their new material through its paces, Dr. Zhu and her colleagues fist poured hot oil onto it and found that their invention showed resistance to oil. They also found that when they made a cup out of the stuff and filled it with water heated almost to the boiling point, the cup remained good for more than two hours. Though this is not as long as a plastic cup would last it is long enough for all practical purposes. Moreover, the new material is twice as strong as the plastic used to make cups, and is definitely biodegradable. When Dr. Zhu buried a cup made out of it in the ground, half of it rotted away within two months.