1 . Do you know how much India struggles to gather the waste plastic water bottles? According to a Central Pollution Control Board (CPCB) report from 2012, India generates 15, 000 tonnes of plastics a day, of which the gathered ones only achieve 60%. The trashed-but-not-gathered plastic waste leads to land and water pollution. posing serious threat to the environment.

After seeing that, Ankur Chawla, a drink expert, undertook research to find a solution, after which he realised the biggest problem the country faced was disposing of plastic waste. To address it, he wanted to come up with a solution where they do not add to the problem of waste. Fortunately, Ankur was not alone. He met Bhrigu Seth who was into green farming. Both of them found that they shared a common goal and it didn’t take long for them to draft a plan of action. It is estimated that over 90 percent of aluminium(铝) drink cans in India are recycled. Instead, 70 percent of the cans are manufactured through recycled waste. After going through challenges at hand, the pair made up their minds.

Before taking the next step. both co-founders visited five-star hotels and took samples of water in aluminium cans, asking them whether they would give it a shot if something like that comes in the market. The pair received an overwhelmingly positive response. They then determined to launch Responsible Whatr, natural spring water drink packed in an aluminium can to solve the problem of waste plastic water bottles.

As one of India’s first natural spring water drink, Responsible Whatr offered an environmentally friendly and endlessly recyclable aluminium can. It’s a non-alcoholic drink that was launched with a vision for an eco-friendly future and an agenda to reduce single-use plastic pollution.

Going forward, Ankur and Bhrigu aim to cooperate with airports and ecommerce gates which would help them in directly reaching the homes of high networth individuals (HNIs). They also plan to tie up with corporate firms and cinema halls and join hands with NGOs that are fighting for the conservation of beaches and oceans.

8 . Biologists Slagsvold and Wiebe have spent years studying tits, flycatchers, and other birds that lay their eggs into holes in trees, walls and even human-made boxes. “Holes are rare, so there’s great competition,” Wiebe said. Birds will sometimes get into fights. Even after a bird gets a hole, it has to watch out: There’s always a chance that a passerby tries to possess it. Owners don’t have many options to wait for and stop thieves. Some police their nest’s entrance hole, but preparing for parenthood is hungry work, and eventually the birds have to leave to get food. So Slagsvold and Wiebe started to look for alternative home-defense systems the birds might be using.

They noticed feathers, usually helping animals keep warm, but that doesn’t seem to be how these particular birds are using them. Blue tits, for instance, get feathers on top of the nest, rather than putting them in. Some other birds dump feathers into holes before gathering other materials. “They’re white, and often noticeable,” Wiebe said, “as if the birds want to send a message.”

To find out, they built nest boxes — some feathery, some not — in Europe and America, and recorded how tits, flycatchers and swallows reacted. The birds entered feather-free boxes quickly. But they froze at the sight of white feathers, sometimes hesitating outside for an hour. Black feathers scared them less, perhaps because they were harder to see. The feathers didn’t stop the birds as most eventually went inside. But even a brief delay can make a huge difference, Wiebe said. “Even 20 minutes can give the owner enough time to circle back, and fight off their competitors.”

The birds’ behavior shows their high-risk lifestyle. They have to think twice as the holes may be hiding danger. The feathers represent possible violence, showing a predator might be inside.

The experiment reflects the lies animals tell where nest sites are rare. They build a scene so horrible to discourage nest stealers. Birds are terrified of death. And they can exploit that reality to safeguard what’s theirs.

9 . When wind blows through a bigleaf maple (大叶枫), paper-thin, wing-like seeds called samaras gently spin towards the ground. The fruit’s tissue allows the wind to guide it further away from the tree. Inspired by the seeds, researchers designed a tiny, winged microchip, no larger than a grain of sand, that is powerful enough to monitor environmental pollution and airborne disease.

Called the microflier, the microchip has no motor to push it forward in the air but instead was designed to catch the wind. To perfect the microchip’s flying capability and shape, scientists took inspiration from the forms of various airborne seeds. The research team improved various designs until the microfliers flew slowly and more steadily than nature’s samara seeds. The slower falling rate allows the microchip to keep flying for longer, which gives it more time to collect data and monitor air pollutants and airborne diseases.

To perfect the microflier’s flight, researchers took inspiration from children’s pop-up books to create the three-dimensional wings. Usually, electronic microchips are flat, two-dimensional objects, but something flat won’t take flight. To make the 3-D shape, John A. Rogers and his team built a stretched rubber base that the microchip rests on. The wings pop into flight mode when the rubber base is relaxed.

The chip gathers data with sensors across its surface that can sense and monitor pH levels, test for heavy metals or chemicals, and track air pollution. An antenna (天线) on the microflier then sends all the collected data to a computer or phone. Rogers and his team are planning to test out the electronic chips soon by dropping thousands of the chips in a field. The microfliers will change color depending on the number of heavy metals present in the field where they land. A drone will then fly over the area and take photos of the microflier’s colors, allowing researchers to map out the pollutants.

Rogers and his team also designed the microchips to break down over time to prevent environmental pollution.