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Category: sustainability

We have everything we need here Especially in Texas no one ever needs to freeze again if they come out of the Fossil Fuel stone age.

The idea is that when electric vehicles are not in use, the energy stored in their batteries is going to waste. If you make it possible for that energy to feed back into the grid, then it can help balance out dips in supply as renewables go offline, rather than relying on fossil-fuel plants to pick up the slack.

The technology that can make that happen is still in its infancy, though. When an electric vehicle is charged, the alternating current from the grid is converted to direct current that can be stored in its batteries. But most charging stations and cars don’t have the hardware to allow this process to run in reverse, meaning the power can’t be fed back into the grid.

That’s starting to change, though, and a city in the Netherlands is leading the charge. In the last two years Utrecht has installed nearly 500 bi-directional charging stations and is positioning itself as one of the world’s leading test beds for the technology.

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For the first time, a spacecraft on another planet has recorded the sounds of a separate spacecraft. NASA’s Perseverance Mars rover used one of its two microphones to listen as the Ingenuity helicopter flew for the fourth time on April 30, 2021. A new video combines footage of the solar-powered helicopter taken by Perseverance’s Mastcam-Z imager with audio from a microphone belonging to the rover’s SuperCam laser instrument.

The laser zaps rocks from a distance, studying their vapor with a spectrometer to reveal their chemical composition. The instrument’s records the sounds of those laser strikes, which provide information on the physical properties of the targets, such as their relative hardness. The microphone can also record , like the Martian wind.

With Perseverance parked 262 feet (80 meters) from the helicopter’s takeoff and landing spot, the rover mission wasn’t sure if the microphone would pick up any sound of the flight. Even during flight, when the helicopter’s blades spin at 2537 rpm, the sound is greatly muffled by the thin Martian atmosphere. It is further obscured by Martian wind gusts during the initial moments of the flight. Listen closely, though, and the helicopter’s hum can be heard faintly above the sound of those winds.

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In the last decade, lab-grown meat has emerged a sustainable alternative to traditional livestock methods. Livestock strain Earth’s land resources and account for about 14.5 percent of global greenhouse gas emissions. But while scientists can grow thin sheets of cow meat and scrape it together to form a patty, people eat with their eyes as much as their mouths. For lab-grown meat to replace a fresh steak, it needs to look like a steak.

Growing lab-based meat into 3D structures is difficult because it needs constant delivery of oxygen and nutrients. In living organisms, vascular systems fill that need. Researchers at Boston College previously showed that skeletonized spinach leaves, stripped of everything but their veiny, oxygen-dispersing, vascular system, can support patches of heart muscle cells. Now, they show that lab-grown meat can grow on skeletonized spinach, an essential step to growing steak-shaped meat in the lab.

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A research team from Brown University has made a major step toward improving the long-term reliability of perovskite solar cells, an emerging clean energy technology. In a study to be published on Friday, May 7 in the journal Science, the team demonstrates a “molecular glue” that keeps a key interface inside cells from degrading. The treatment dramatically increases cells’ stability and reliability over time, while also improving the efficiency with which they convert sunlight into electricity.

“There have been great strides in increasing the power-conversion efficiency of solar ,” said Nitin Padture, a professor of engineering at Brown University and senior author of the new research. “But the final hurdle to be cleared before the technology can be widely available is reliability—making cells that maintain their performance over time. That’s one of the things my research group has been working on, and we’re happy to report some important progress.”

Perovskites are a class of materials with a particular crystalline atomic structure. A little over a decade ago, researchers showed that perovskites are very good at absorbing light, which set off a flood of new research into perovskite solar cells. The efficiency of those cells has increased quickly and now rivals that of traditional silicon cells. The difference is that perovskite light absorbers can be made at near , whereas silicon needs to be grown from a melt at a temperature approaching 2700 degrees Fahrenheit. Perovskite films are also about 400 times thinner than silicon wafers. The relative ease of the manufacturing processes and the use of less material means perovskite cells can be potentially made at a fraction of the cost of silicon cells.

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autonomous air vehicle company ehang unveils ‘baobab’, a large tree-like tower and landing platform for its EH216 passenger drones. designed by giancarlo zema design group (GZDG) with sustainability at the core, photovoltaic panels on the vertiports will generate energy and independent plug-and-play charging points will recharge the drones wirelessly. currently in the development stage, ehang and GZDG hope to enter the emerging global eco-tourism sector with hubs being planned for a lakeside site in china’s zhaoqing city as well as in the maldives, the united arab emirates, and italy.

Images courtesy of giancarlo zema design group (GZDG)

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And as well as producing less waste, insects can also live off food and biomass that would otherwise be thrown away, says Collins, contributing to the circular economy, where resources are recycled and reused. Insects can be fed agricultural waste, such as the stems and stalks from plants that people don’t eat, or scraps of food waste. To complete the recycling chain, their excrement can be used as fertiliser for crops.

Insects are a nutrition-dense source of protein embraced by much of the world. Why are some of us so squeamish about eating them?

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“This work confirms that there is a link between air pollution and how well the aging brain works,” senior study author and Columbia University researcher Andrea Baccarelli told The Guardian. “These shorter-term effects are reversible: when air pollution clears, our brain reboots and starts working back to its original level. However, multiple occurrences of these higher exposures cause permanent damage.”

Thankfully, it’s reversible.

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Innovation in Uganda.

Access to clean water may be a right, but it’s often hard to come by. Contaminated water kills. Henry Othieno and Saudah Birungi have developed eco-friendly filters for use in schools and homes. They turn dirty lake water into drinking water.

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#WaterFilters #Uganda #CleanWater

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Excellent! Technology is available to make real change. Support efforts to clean the seas and use renewable energy sources.

Tired of hitting these floating objects during his races and seeing heavenly places turn into landfills, a French ocean adventurer Yvan Bourgnon decided to fight against this global scourge. He and his team have designed Manta, a giant, plastic-eating catamaran powered by renewable energy. The sea vessel literally scoops up plastic garbage and converts it into fuel to help power the boat.

Yvan Bourgnon – who has years of experience career racing sailing boats around the world’s oceans – is the mastermind behind the venture. A steady increase in encounters with floating fields of garbage in the ocean inspired him to start the SeaCleaners project and build Manta, a 56-meter (184 foot) catamaran powered by a combination of advanced sail technology and electric motors.

The giant sailing boat will be the first of its kind capable of collecting, processing, and recovering large quantities of marine plastic waste. Built from low-carbon steel, the Manta features a custom electric hybrid propulsion system that allows maneuvering at low speed for sensitive operations (such as the entry to and exit from ports), as well as waste collections, which are carried out at 2 or 3 knots. Agile and energy-efficient, the Manta can reach a top speed of over 12 knots.

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