3 . Raising livestock (牲畜) is a big part of the carbon emission from agriculture. But it is hard to change people’s habits and get them to give up their hamburgers, especially since more than one-third of Americans eat fast food every day. We previously called for carbon labels on everything from buildings to burgers. Now, a new study from the Johns Hopkins Bloomberg School of Public Health found that labels on fast food affected people’s choices.

The study said shifting current dietary patterns to more sustainable diets with less red meat could reduce food-related greenhouse gas emissions by 55% and have health benefits.

The 5,000 participants in the study were shown fake menus. One group got menus with high climate impact labels on red meat items and another had low climate impact labels on fish or plant-based burgers. Both menus were effective in reducing the orders for red meat. But interestingly, the high-impact labels were far more effective, with 23% of the participants choosing a more environmentally sustainable selection, while menus listing low-impact choices encouraged only 10% participants to change.

“We found that labeling red meat items with high-climate impact labels was more effective in increasing sustainable selections than labeling non-red meat items with low-climate impact labels,” wrote the authors of the study.

Lead author, Julia Wolfson, said, “These results suggest that menu labeling, particularly labels warning that an item has high climate impact, can be an effective strategy for encouraging more sustainable food choices in a fast food setting.”

The study points out negative labels might be unpopular: “It is unlikely that the industry would voluntarily adopt a negative label approach; such an approach needs to be carried out via law. However, high climate impact labels may easily be adopted in settings like universities and hospitals.”

They have a point that this label is aggressively negative, more like a cigarette warning than a food label. In the study, the authors note that future research should test more label designs using qualitative and quantitative research on how people understand different climate impact labels.

4 . Dandelion (蒲公英) seeds are some of the best flyers in nature, catching the wind and spreading as far as 100 kilometers. Each dandelion seed is tied by a thin tube to around 100 hairs, which form the parachute-like (类似降落伞的) structure. When seeds break free from the flower head, these hairs catch the wind and carry their seeds. This hairy parachute closes when the air is humid (潮湿的), which often means the wind is weak. In drier and windier conditions, dandelions widen their parachutes to better catch the wind so the seeds can fly freely.

However, in the past, nobody knew how they sense and respond to their environment so effectively.

Now researchers have uncovered the secret “thinking” behind dandelions’ spreading seeds. Their work, published in Nature Communications, found the seed-carrying parachutes open and close using something like actuators — devices that change signals into movement — without using active input of energy. The center of the parachutes senses the humidity of their immediate environment by absorbing water molecules (分子) from the air. Responding to these humidity signals, they either open their parachutes and fly away, or close their parachutes and stay put.

Study author Dr. Naomi Nakayama of the Department of Bioengineering who led the work said that their findings reveal how the dandelion ensures the survival of its species by making perhaps the most important decision in a plant’s life — to stay or go to seek a better habitat.

“Understanding how dandelions work is fascinating because the dandelion is the foundation of ecosystems. It feeds insects and birds,” Nakayama says. “So, the environmental sensitivity of their flight is an important topic for us to understand how nature will change in future climates.”

Located in Ordos, North China’s Inner Mongolia Autonomous Region, Kubuqi Desert (库布齐沙漠) is the closest desert to China’s capital Beijing. It was once known as the “sea of death”. However, in the past 30 years, the government, social organizations and local farmers     1     (work) together to control desertification (沙漠化) in Kubuqi Desert.

Historically, Kubuqi was a rich city filled with water and grass. But due     2     climate change and over-exploitation from humans, the farmlands gradually turned to desert. Controlling desertification was the only way out for people still living in Kubuqi. With the first highway going through the desert     3     (build) here, people started planting trees in     4     whole desert. It was common for planted trees to die. But the next year, people just continued to plant more trees.     5     (ultimate), their hard work inspired the term “Kubuqi spirit”, encouraging local people     6     (devote) themselves to the desert greatly. Over three decades, tree planting technology saw further     7     (improve) in Kubuqi. Now workers can plant a tree in just ten     8     (second), and the survival rate of trees is over 80 percent.

The 102,000 residents in the desert have enjoyed the benefits of managing with desertification. Meng Keda,     9     family has lived deep in Kubuqi Desert for generations, began a tourism business in 2006     10     earned about 300,000 yuan last year.

6 . Off the coast of Formentera, an island, lives seagrass that stretches 15 kilometres. The seagrass, covering several hectares, is made up of a single organism. The grass is also long-lived, for tens or hundreds of thousands of years. Along with two other kinds of coastal ecosystems — mangrove swamps (红树沼泽) and tidal marshes, seagrass meadows are particularly good at taking carbon dioxide from the air.

This role was highlighted in a report, which was published on March 2nd by UNESCO, on blue carbon — the carbon taken in by Earth’s oceanic and coastal ecosystems. In total around 33 billion tons of carbon dioxide, about three quarters of the world’s emissions in 2019, are locked away in the planet’s blue carbon sinks. Research by Carlos Duarte, the report’s author and a marine (海洋的) ecologist, has shown that one hectare of seagrass can take in as much carbon dioxide each year as 15 hectares of rainforest.

One reason that blue-carbon ecosystems make such effective sinks is that underwater forests are thicker than the land-based woods. They can also trap (收集) floating pieces and organic matter, which settles on the sea floor and can double the amount of carbon stored away. They have another advantage, too. Climate change is leading to more wildfires around the world. As forests burn, their carbon stocks are released back into the atmosphere. Unlike forests on land, blue-carbon ecosystems do not burn.

Blue-carbon ecosystems may not be fired, but they remain affected to other sorts of disasters. In May 2020 hurricane Amphan destroyed 1,200 square kilometres of mangrove forest. A marine heatwave in Australian waters in 2010 and 2011 damaged around one third of the world’s largest seagrass meadow in Shark Bay. “Mangrove forests can weaken or control waves and provide natural barriers to storm surges. Protecting and expanding them, then, appears to be a must,” said a marine biologist.

Thailand’s long-lasting image of a nation     1     is filled with     2     (origin) rainforests, mountains and clean, untouched beaches,     3     (attract) millions of visitors during the past few years. However, its global     4     (popular) comes at a cost to the local environment.

In order to preserve Thailand’s natural wonders, the nation is considering a plan to cut the waste     5     (bring) by visitors with the Tourism Authority of Thailand. The goal is     6     (reduce) plastic garbage by up to 50% by 2024. The government is calling on visitors to leave “only     7     (they) footprints and take only good memories”.     8     increasing number of nation’s most attractive scenic spots have already taken action     9     (instant). For example, Ko Mak, an island famous     10     its pure white sandy beaches, and a popular living island Ko Tao are both sharing some environmental solutions with local businesses and visitors.

9 . Coral reefs (礁) are filled with a diverse range of marine lives. Some fish are more beautiful to humans than others, and their outward appearance could be influencing how we decide which species to protect. The fish humans find the ugliest are the most ecologically and evolutionarily (进化上) distinct. But perhaps more importantly, the uglier species are also more likely to be threatened, according to a new paper published in the journal PLOS Biology.

Researchers showed 481 photographs of ray-finned reef fishes to 13,000 members of the public. With that data, they then trained a computer model to generate subsequent (紧随其后的) predictions for an additional 4,400 photographs of 2,417 of the most common reef fish species. They next compared the aesthetic (审美的) rating of each species with other characteristics, including evolutionary history, distinctiveness from other fish, conservation position and importance to fisheries.

After analyzing the numbers, researchers found that the fish humans rated as the most beautiful tended to be less ecologically and evolutionarily distinct. Prettier fish were also more likely to be listed as species of “least concern” on the International Union for Conservation of Nature (IUCN) Red List.

On the contrary, the fish that humans found to be the least attractive were the most ecologically and evolutionarily distinct, and they were more likely to be listed as “threatened” on the IUCN Red List. Unattractive species also tended to be more important to money-focused fisheries, which puts them at higher risk of overfishing.

When conservation funding and energy is limited, uglier fish are likely to be overshadowed by more beautiful fish. It’s not surprising that humans are easily attracted by beautiful wildlife, but the findings point to important mismatches between potential public support for conservation and the species most in need of this support.

“To minimize the impact of aesthetic biases (偏见), scientists, conservation groups and policymakers may need to change how they communicate about wildlife,” the researchers write in the paper. “Making people more aware of the roles uglier fish play in reef ecosystems could help them gain more support. In other words, never judge a fish by its look.”

10 . The Intergovernmental Panel on Climate Change (IPCC) released a report. It stated that the world is quickly running out of time to keep global warming below 1.5 degrees Celsius, the level widely agreed to be the conservative, safety-first goal to prevent serious climate harm. To get there, the world would have to cut current emissions (排放物) by 45 percent by 2030. That sounds absurdly unlikely.

But before we give in to despair, we should remember that the technology to address climate change is going along at high speed. The largest source of US carbon emissions is transportation, and a Green New Deal program for motor vehicles would be quite straightforward.

The reason is simple: With some subsidies (补贴), electric cars and buses are cost- competitive with fossil-fuel vehicles. Electric buses have gone into the market at the greatest speed, because they are a logical choice for electrification. At the end of 2018, electric vehicles were displacing about 280,000 barrels of oil demand per day. That’s more than the whole consumption of Greece.

And the electric car market is also reaching maturity, with appealing designs, longer range, and a quickly-expanding rapid charging network in many countries. It’s worth emphasizing that most of the basic systems necessary to recharge electric vehicles already exist. People often tend to assume that we would need to replace every gas station, but virtually all homes and businesses already have an electrical connection which can be easily improved for fast charging. All that is needed to go fully electric is enough battery capacity and fast charging stations to deal with long trips.

Now America would have to repair its electricity production, rails, shipping, and so on to fully decarbonize (脱碳) the transportation sector. It will be considerably more difficult than simply rooting out fossil fuel vehicles from the market.

But greening America’s vehicles would be straightforward, relatively cheap, and a huge step forward on climate. The politics of climate change are so fearful that despair can seem logical, but the first step in achieving a tough goal is the firm belief that it can be done. And this particular step wouldn’t even be that tough.