【推荐2】A nine-year-old boy has set a new 5km parkrun world record for his age group. Louis Robinett, a member of the Poole Runners junior athletics club, shaved 13 seconds off the previous world record, which was set in California in 2017, after he crossed the line in 17 minutes and 40 seconds.

Louis, who broke the record at the Poole parkrun in Dorset on Saturday, said, “I’m on top of the world right now. It’s a huge deal to break a world record. I couldn’t have done it without the support of my family and the team at Poole Runners.”

Louis was accompanied on the parkrun by Dion Garner, a member of his athletics club, as all under-11s in the 5km event must run within arm’s length of an adult. Garner said of Louis’s achievement, “His natural talent, combined with his dedication and spirit, is mind-blowing. He loves the sports and has really practiced a lot.” A spokesman for Poole Runners said, “With his new world record, Louis has raised the bar for young athletes everywhere. This isn’t just a win for Louis, it’s a new benchmark (标准) for youth sports, inspiring children all over the world to aim higher.”

Parkrun was started by 13 friends as a weekly event in Bushy Park, southwest London, in 2004. By 2015 more than 80,000 people were gathering in parks around the world each Saturday to participate in a parkrun. Only three years later about a quarter of a million people were taking part in parkruns each week, in 1,500 events spread across 20 countries. In comparison, 48,000 runners took part in the London Marathon this year.

【推荐1】There are just two species of flowering plant native to the Antarctic peninsula (半岛), which are now growing at record rates as temperatures rise and ice begins to melt, according to a new study. One is Antarctic hair grass, which grew as much in 2009—2019 as it had in the previous 50 years; the other is Antarctic pearl wort, which has seen the speed of growth increase five times over the same period.

A team led by Nicoletta Cannone, a researcher from the University of Insubria, Italy, measured the growth of Antarctica’s two native plants at sites on Signy Island. The results were shocking: the sites have not only seen faster growth, but they have become more densely populated by the plants each year, which indicates the climate has got warmer.

According to nonprofit Discovering Antarctica, the region’s temperatures have warmed by an average of 3°C as a result of human-caused climate change, meaning once stable ice shelves are now narrowing down. In some parts, that has given way to land now habitable to the two plant species.

Peter Convey, at the British Antarctic Survey, told the New Scientist: “The most novel feature of this is not that something is growing faster but that we’re starting to see what is almost like a step change or a tipping point.” And Matthew Davey, at the Scottish Association for Marine Science in Oban, UK, added: “Increasing expansion is now clearly evident in the region. This research gives us the first all-sided data showing how fast and how dense the plant community may expand.”

The researchers acknowledged there could be other factors at play causing the plants’ growth, such as the decreasing fur seal population—but this also is linked to climate change. Meanwhile, as the land becomes more habitable, non-native species could also occupy the land and grow more than native plants, which could in turn destabilize long-established local ecosystems.

“If we estimate what we observed on Signy Island to other sites in Antarctica, a similar process can also occur,” said Cannone “This means the Antarctic landscape and biodiversity could change rapidly. And that really concerns all.”

【推荐2】Artificial intelligence (Al) has the potential to develop more efficient methods of farming in order to fight global warming.

Global warming threatens every aspect of our everyday lives, including crop production. It will reduce the soil moisture (水分) in areas close to the equator according to a study. We are already seeing the negative impact of these changed growing conditions on our crop production. Climate change harms poorer countries that do not have the money to import food. The result is growing food insecurity. However, agriculture is not just affected by global warming — agriculture is part of a vicious (恶性的) cycle in which farming leads to global warming, which in turn destroys agricultural production. The process of clearing land for agriculture results in widespread deforestation (毁林) and contributes to 40 percent of global methane production. Therefore, to deal with climate change, it is necessary to ensure reforestation — but how? What is the path to efficient, environmentally-conscious farming?

This is where AI enters the scene. Farmers use AI for methods such as precision agriculture; they can monitor crop moisture, soil composition, and temperature in growing areas, enabling farmers to increase production by learning how to take care of their crops and determine the ideal amount of water to use. Furthermore, this technology may help reduce deforestation by allowing humans to grow food in urban areas. It could be especially beneficial for countries in Latin America and the Caribbean, where much of the population lives in cities.

However, AI is far from a silver bullet — it could actually contribute to global warming as well. Due to the large amount of data that AI needs to process, training a single AI releases five times the emissions that an average car would give off during its lifetime. Further, securing access to AI on a global scale may pose some challenges. Countries will need experts in the field who can successfully use the technology and Internet connection, neither of which are always readily available. Therefore, there is still a long way for developing countries to take advantage of the benefits of AI.

Given these concerns, global leaders must consider the potential costs, and the environmental consequences of data processing before developing AI for use in agriculture.

【推荐3】To adapt to climate change, some flowers are darkening their color to protect themselves from the sun’s radiation, new research shows.

The study suggests that over the past 75 years, the ultraviolet (UV) pigments (紫外线色素) in flowers have increased in response to rising temperatures and a thinning ozone layer (臭氧层). The flowers won’t look any different to humans, but insects consider the higher levels of UV pigments as a darker color, which could be confusing when they try to find out colorful flowers to land on.

The UV-absorbing pigments in flowers work like sunscreen and protect sensitive cells from harmful radiation, Matthew Koski, a plant ecologist at Clemson University, says. He and his team hoped to determine if changes in pigments were a result of environmental change — and if so, what are the plants responding to?

The team collected dried, pressed plants across North America, Australia, and Europe. In total, they studied 1,238 samples from 42 different species dating back to 1941. Then, using a UV-sensitive camera, they photographed flower petals from each species to see how the pigment level changed over time. Next, they paired the photographs with historic local temperature and ozone level data from the time the plant was picked.

The researchers found that the changes in pigments differ by species, a result of the flower’s structure. Flowers with open, exposed pollen (花粉) had more UV-absorbing pigments when ozone levels were low and radiation was high. But flowers with pollen surrounded by the petal responded to temperature, not ozone levels.

As climate change continues to intensify, these changes in flowers’ color can affect plant-insect interactions. When the whole flowers get darker, insects might miss the flowers entirely. “This has a negative influence on plant reproduction.” Koski says.