Bangladesh's floating gardens, built to grow food during flood seasons, could offer a continuous solution for parts of the world which are likely to suffer from flooding because of climate change, a new study has found.

Bangladesh's floating gardens began hundreds of years ago. The gardens are made from native plants that float in the rivers and operate almost like rafts (筏), rising and filling with the waters. Historically, they were used to continue growing food during rainy seasons when rivers were filled with water.

The farmers layer the plants about three feet deep, creating a version of raised-bed gardens that float in the water. Then, they plant vegetables inside those rafts. As the raft-plants rot away, they release nutrients, which help feed the vegetable plants.

But as climate change affected the volume of water in those rivers, the researchers wanted to understand whether Bangladesh's floating gardens could be a continuous farming practice. They interviewed farming families and found strong evidence that floating gardens provide stability, both in the amount of food available to feed rural populations and in a farming family's income.

They found that farmers typically use hybrid (杂交) seeds, which must be repurchased each year, to grow a diverse range of vegetables in the floating gardens. The gardens are also sensitive to pests, so farmers end up spending some money on both pesticides and fertilizers. But even with those expenses, they found, benefits outweighed costs. One farmer told the research team that he earns up to four times as much money from the gardens as from traditional rice fields.

However, before gaining profits, farmers often take out high-interest loans (贷款) to cover the investment costs of filling the beds and stocking them with plants. Luckily; there are also lower-interest loans from responsible government or non-governmental organizations, which could ease that burden.

Standing desks have become common across Silicon Valley, offering health benefits to those willing to work on their feet. However, due to their high price, they have failed to catch on until now. Recently, Ikea has brought out Bekant convertible（可变换的） standing desk that can become a normal desk at the touch of a button. The $500 adjustable desk can transform from a standard desk to a standing one, and Ikea hopes it could make the standing desk mainstream.

Experts say that changing from a seated to a standing desk can improve productivity. Similar desks have become a common sight at tech firms such as Google, where some employees have even installed treadmill (跑步机) and bicycle desks.

The desk is not the first “convertible” on the market. As early as 2013, Stir Kinect brought out an adjustable desk. The $3,890 Stir Kinect desk has a motor to raise and lower itself, changing it into a standing desk or a traditional desk. The desk can even be programmed to move up and down slightly, making it appear to take a gentle breath to remind the user to change their positions. To move between sitting and standing positions, owners simply double tap on the screen. The desk can learn the user’s preferences over time and suggest the best seating position.

The Stir Kinect desk was created by a team of ex-Apple and Disney engineers. It has a built-in touch screen to control and track movement, and can tell users exactly how many calories they burn by standing during their working day. It also has devices containing power points and USB ports for charging phones, to keep cables hidden.

“ Ikea’s height-adjustable desk is great for opening up the lower end of the market, ’’ said JP Labrosse, founder and CEO of Stir.

Like many Californians, Ryan Honary, 12, has a personal experience with wildfires. As a student at Pegasus School in Huntington, he was with his father at an Arizona tennis tournament when he saw wildfires raging across his home state on TV. “The hills that were burning looked just like the hills behind my house,” Ryan recalls. “I called my mom and asked if she was okay.” Once he knew that she was, he asked his dad why wildfires got out of control so often. “We’re planning to send people to Mars but we can’t detect wildfires,” Ryan says.

That’s when Ryan decided to create a way to detect wildfires early. He linked together a series of Raspberry Pi computers. Some of these tiny units were fitted to detect smoke, fire and humidity (湿度). Their sensors sent data wirelessly to another Raspberry Pi. This slightly bigger computer served as a mini meteorolbgical station (气象站).

Ryan brought his entire system to a park and tested it by holding the fire from a lighter in front of each sensor. When these sensed a fire, they informed the mini station. It then alerted an app that Ryan built for his phone. While creating that app, Ryan talked with Mohammed Kachuee, who is a graduate student at the University of California, Los Angeles. Kachuee helped Ryan use machine learning to train his app with data from the large 2018 Camp Fire. The app took lessons from how this fire had traveled over time. Using those data, the app “learned” to predict how fire at future events might spread.

Someday, Ryan hopes his sensors might be deployed throughout his state. “Five of the worst fires in California just happened in the last three months,” he notes. “So it’s pretty obvious that global warming and climate change are just making the fire problems worse.”