2 . For years, twice a day Aadya Joshi walked past a dump filled with smelly rubbish in her neighbourhood of south Mumbai on her way to and from school. Originally it was meant to be the garden of the local police station. When she was 15, during her summer holidays, Joshi decided to do something about it. “I walked into the police station and was like, ‘Can I please clean your garden?’” recalls Joshi. “It took three or four weeks to eventually convince them that I was not going to give up halfway and leave them with more work.”

The plot of land covers an area of 60 square meters, about a quarter of a tennis court. But, over the course of four Sundays in the summer, with help of local residents, Joshi did more than clear it. She replanted it with native Indian plants and trees. Joshi said, “The first day that we cleaned up I made the mistake of not wearing gloves and I was sick for two weeks.”

The idea for native planting came from Joshi’s reading on the Miyawaki method of afforestation (植树造林) and the work of University of Delaware ecologist Douglas Tallamy. These both argue that planting the right trees can have a significant impact on restoring insect and animal biodiversity. The results in Mumbai were instantaneous: monkeys now hang out at the police station, and butterflies and birds have made the garden their home.

After creating the garden, Joshi developed a database of 2,000 plants unique to the Indian subcontinent and last year was awarded the annual Children’s Climate prize, founded by Swedish energy company Telge Energi. Her advice for others looking to follow in her footsteps: “If you bite off more than you can chew in the beginning, you will be stuck and lose motivation,” she says. “But something small, like your neighbourhood police station, it’s very manageable.”

3 . Coral reefs are the rainforests of the ocean. They exist on vast scales and are equally important havens of biodiversity. Reefs occupy 0.1% of the oceans.     1    

Corals are useful to people. Without the protection which reefs afford from crashing waves, low-lying islands such as the Maldives would have flooded long ago, and a billion people would lose food or income. However, reefs are under threat from rising sea temperatures. Heat causes the algae (海藻) with which corals are living together to generate toxins (毒素) that force those coral to leave.     2    

Research groups around the world are coming up with plans of action to see if that will help, such as identifying naturally heat-resistant corals and cross-breeding such corals to create a new type.     3     Without carbon reduction and decline in local, coral-killing pollution, even resistant corals will not survive the century.

Doubters doubt humanity will get its act together in time to make much difference.

    4     Carbon targets are being set and ocean pollution is being dealt with. Countries that share responsibilities for reefs are starting to act together. Scientific workarounds can also be found. Natural currents can be applied to facilitate mass breeding. Sites of the greatest ecological and economical importance can be identified to maximize bang for buck.

    5     It could serve as a blueprint for other ecosystems. Hard-core greens — those who think that all habitats should be kept unspoiled — may not approve. But when entire ecosystems are facing destruction, the cost of doing nothing is too great to bear.

6 . Concrete has served as the foundation stone of the construction industry for hundreds of years. However, the process of producing concrete is one of the most environmentally unfriendly processes in the world. In the process, not only is carbon dioxide (二氧化碳) released into the air by the energy used to heat the limestone, but the limestone itself also gives out a huge amount of the element.

Luckily, a number of start-ups throughout the world are using creative thinking to make the construction industry a whole lot more friendly for the planet.

A Canadian company called CarbonCure, has found a way to inject (注入) concrete with carbon dioxide itself. Not only does this trap the carbon dioxide into the concrete, keeping it from running away into the atmosphere, but it also creates a super strong material called calcium carbonate, which reduces the total amount of concrete that needs to be used.

California-based Brimstone, is creating carbon-negative concrete by doing away with limestone entirely and instead using silicate rock, a material that does not release carbon dioxide when heated. Instead, the process produces magnesium (镁) , which absorbs carbon dioxide, as the basis for their concrete.

Additionally, researchers at Australia’s RMIT University have recently released a study showing that adding coffee grounds instead of sand to concrete could make it much stronger, reducing both the amount of sand used, as well as the amount of concrete that would need to be used in the final product.

The biggest barrier at this point is convincing members of the industry that the new types of concrete are safe to be used, according to Stacy Smedley, director at a nonprofit focused on decarbonizing construction.

Hopefully these new solutions to the environmental problems of concrete will soon be widely adopted. Given the significant part the construction industry has in releasing carbon dioxide into the atmosphere, great improvements can be made when more environmentally-friendly materials are used.

About 385, 000 people from 192 countries take part in the yearly project to count birds. The event    1    (launch)for the first time 25 years ago.

Steve and Janet Kistler from the American state of Kentucky are among those     2    (involve) themselves in it. They’ve done so every year    3    the now-international tradition started in 1998. For Moira Dalibor,     4     schoolteacher from nearby Lexington, this is her first event. She’s leading a group of students and parents to a garden     5    (collect) data.

Becca Rodomsky-Bish,    6    works at the Cornell Lab of Ornithology in New York, is the project’s leader. The Lab organizes the Great Backyard Bird Count (GBBC) along with the National Audubon Society and Birds Canada. “Every year we see increased participation, and 2022 was a big jump,” Becca said. In India, which had the     7    (high) participation outside the US last year, tens of thousands of people submitted bird checklists.

The worldwide data goes into the eBird database used by scientists for research on different bird     8    (population). The GBBC is part of a rise in “citizen science" projects in which volunteers collect data about the    9    (nature) world for use by researchers. The information helps researchers track the numbers of different kinds of birds, which then helps with their     10    (protect).

Rising sea levels are threatening coastlines in China, for example in     1     (city) such as Shanghai, Tianjin and Guangzhou. If sea levels rise by one meter, more than 92,000 square kilometers of China’s coast could be flooded. This could potentially force 67 million people     2     (move) away. Almost two-thirds of the ice in Asia’s glaciers (冰川) could disappear if average global temperature rises beyond 1.5℃ by the end of the century. If that happens, the impacts     3     China will be felt in multiple areas, from water availability, to agriculture, and to biodiversity.

The good news is     4     China is becoming a global leader on climate action. For example, over the last five years, China     5     (use) more solar and wind energy than any other country in the world. China is also the largest clean energy investor in the world —     6     (spend) some $130 billion in new energy in recent years.

The development of electric vehicles is particularly     7     (inspire) in China. More than 50 percent of electric vehicles in the world     8     (sell) in China every year. And China is now a world leader in the     9     (promote) of clean energy technologies.

Ecological civilization has become the cornerstone (基石) of China’s long-term development strategy, much like climate action is     10     important part of the 17 Sustainable Development Goals.