【推荐2】In a kitchen at the company Eat Just, a playing-card-sized slice of meat is served. The meal is remarkable because the meat to be tested was grown in a lab rather than on an animal. The taste, look and smell of the meat is identical to that of chicken. And that’s the key point.

While meat and dairy production accounts for 12% of human greenhouse-gas emissions, lab-grown meat may be less worrisome than eating animals. And the early success of plant-based meat alternatives gave investors hope. Both of the two ways to make cultivated meat start with cells taken from live animals. One option is to put the cells in a stainless tank, called a “bioreactor”, which is filled with a nutrient-rich liquid taken from cow embryos (胚胎). The cells multiply, and after a month or so the meat can be harvested and turned into meat products. The alternative is to place the cells on a scaffold (支架). That encourages them to grow into a certain shape, and is used to create meat, such as steaks.

Every firm faces the big challenge of the high cost, though progress is being made. Meat-makers hope that costs can be cut further by a new supply chain, which involves existing companies and new entrants.

There are questions about how climate-friendly cultivated meat really is. Even its fans acknowledge that the technology is energy-consuming. A study published in January found that tank-grown meat is likely to use much more energy than farm-grown protein because the bioreactor needs a lot of power to control its temperature. As a result, cultivated meat will only cut the carbon footprint of the meat industry if renewable energy is used in the production process.

Whether lab-grown meat can be made attractive and cheap enough to appeal to consumers remains to be seen. Meanwhile, many companies have decided to pursue a hybrid (混合的) strategy, mixing cheap plant protein with their cultivated animal cells. “It took me a while to get comfortable with the hybrid, because it feels a bit like we’re moving back,” admits Josh, Eat Just’s boss.

【推荐1】Worrying new figures from a national survey conducted by Kingswim have revealed 51 percent of Australian adults can’t swim 50 metres or more without stopping. However, the news is better for our kids, with statistics showing that childhood swimming lessons are paying off.

“These statistics are reflected in the Royal Life Saving 2018 Drowning Report, with 32 percent of drowning deaths occurring in the 55+ age range compared to 19 percent for under 25s,” says Kingswim Marketing Manager. Rowena Thomasson.“While these are terrible statistics it’s not all sad news; the survey revealed younger demographics(群体) had a much higher swimming ability, which correlated with the swimming lessons they received as children.”

Kidsafe Victoria CEO Melanie Courtney says that swimming lessons are a critical part of comprehensive home pool safety defence. “Children can drown quickly and silently in just a few centimeters of water. Swimming lessons, together with active adult supervision—both in and around water—first aid knowledge and a well-maintained pool barrier are critical elements in keeping your family safe over the coming summer season.”

Mum of three, Jenny Ong says she knows all too well the anxiety caused by not being able to swim as an adult. “Neither my partner or I am confident in the water so teaching our girls to swim was always going to be difficult for us,” she says. “I won’t swim anywhere, I can’t touch the bottom and I don’t want my children to feel the same uneasiness in the water. My eldest two now both take regular lessons which they absolutely love and I’m relieved to know they’re mastering a lifesaving skill.”

The research proved that children with professional swimming lessons to subsidise any lessons at home were much more confident in their ability to swim as an adult. “Close to half of people aged between 18 and 24 say they had swimming lessons through three or more channels, with 84 percent believing they received adequate swimming lessons as a child — demonstrating how crucial it is for children to receive professional swimming lessons in addition to anything taught at home,” says Thomasson.

【推荐2】After taking a few steps back to get a running start, Hadj Benhalima dashed toward the building, pushed against its wall with his foot, pushed himself upward and stretched out his arm.

At the peak of his leap, he fingered oft a light switch, more than 1o feet off the ground. The bright lights of a nearby barbershop went off instantly

Groups of young athletes practicing Parkour—the practice of passing obstacles in a man—made or natural environment through the use of running, vaulting (腾跃), jumping, climbing, rolling, and other movements in order to travel from one point to another in the quickest and most efficient way possible without the use of equipment—have been swinging around big French cities switching off wasteful shop signs at night, in an effort to fight light pollution and save energy.

These so—called Light Off operations have become extra popular in recent months, with France embarking on energy conservation efforts.

Paris, the City of Light, is a favorite target. While its landmark monuments now go dark earlier than usual, many store signs still stay lit all night.

“Everyone can contribute in their own way” to save energy, said Kevin Ha, the leader of the Paris—based Op he Spot Parkour group, with about 20 members. “We put our physical abilities to good use.”

Enforcing the orders in place of the authorities certainly enters a legal gray area. But the group said all the police officers they have met during their rounds have approved of their deeds—as long as it causes no damage.