CLOSE
Original image
Advanced Materials

Roofs Covered With Plastic Grass Could Harness Wind Energy

Original image
Advanced Materials

One group of scientists is trying to harness wind energy by mimicking the motions of a field of grass rippling in the breeze—except their grass is made of plastic and their field is on a roof.

According to the findings publishing in the journal Advanced Materials, a joint team of Chinese and American researchers created an experimental turboelectric nanogenerator (TENG). Here's how it works: The team adhered plastic strips to a board in a way that makes them stand upright in rows. One side of each strip is coated with nanowires and the other side with indium tin oxide (ITO). When the “grass” is pushed by the wind, the nanowires brush against the ITO sides of the surrounding strips, allowing electrons to pass from one piece to the next. This generates a current via the triboelectric effect.

This method of generating wind power could be practical in many situations. In addition to harnessing power from steady gusts, the technology would be able to effectively work with choppy winds blowing in any direction and would be ideal for spots where windmills would be impractical.

The experimental TENG—which so far has only been tested in a lab by using an electric fan and 60 strips of plastic on a model rooftop—generated enough energy to light 60 LEDs. The system was also functional in wind speeds as low as 13 mph and was most effective in close to 62-mph winds—a speed too high to be practical, as one researcher noted to New Scientist.

While the project is still far from ready to be used out in the real world, a 985-square-foot rooftop carpeted with the strips would generate 7.11 kilowatts, enough energy to mostly power a home, according to the researchers. For now, the team is focused on figuring out a way to efficiently store the energy that’s generated. They will also need to find a substitute for indium tin oxide because it's both toxic and expensive. 

[h/t: New Scientist]

Original image
Press TV News Videos, YouTube
arrow
Animals
Why Blue Dogs Have Been Roaming Mumbai
Original image
Press TV News Videos, YouTube

Residents of Mumbai began noticing a peculiar sight on August 11: roving stray dogs tinted a light shade of blue. No one knew what to make of these canines, which were spotted in the streets seemingly unharmed but otherwise bucking nature.

Concerned observers now have an answer, but it’s not a very reassuring one. According to The Guardian, the 11 Smurf-colored animals were the result of pollution run-off in the nearby Kasadi River. Industrial waste, including dyes, has been identified as coming from a nearby manufacturing plant. Although dogs are known to swim in the river, the blue dye was also found in the air. After complaints, the Maharashtra Pollution Control Board investigated and found the factory, Ducol Organics Pvt Ltd., was not adhering to regulatory guidelines for waste disposal. They shut off water to the facility and issued a notice of closure last Friday.

“There are a set of norms that every industry needs to follow,” MPCB regional officer Anil Mohekar told The Hindustan Times. “After our sub-regional officers confirmed media reports that dogs were indeed turning blue due to air and water pollution, we conducted a detailed survey at the plant … We will ensure that the plant does not function from Monday and the decision sets an example for other polluting industries, which may not be following pollution abatement measures.”

Animal services workers who retrieved five of the dogs were able to wash off the dye. They reported that no other health issues were detected.

[h/t The Guardian]

Original image
iStock
arrow
environment
A Coral Reef in Mexico Just Got Its Own Insurance Policy
Original image
iStock

The Puerto Morelos coral reef, about 20 miles south of Cancún, is one of Mexico’s most popular snorkeling attractions. It also serves a vital purpose beyond drawing tourists. Like all reefs, it provides a buffer for the coast, protecting nearby beaches from brutal waves and storms. And so the beachside businesses that rely on the reef have decided to protect the coral as they would any other vital asset: with insurance. As Fast Company reports, the reef now has its own insurance policy, the first-ever policy of its kind.

Coral reefs are currently threatened by increasing ocean acidification, warmer waters, pollution, and other ocean changes that put them at risk of extinction. Mass coral bleachings are affecting reefs all over the world. That’s not to mention the risk of damage during extreme storms, which are becoming more frequent due to climate change.

Businesses in Puerto Morelos and Cancún pay the premiums for the Reef & Beach Resilience and Insurance Fund, and if the reef gets damaged, the insurance company will pay to help restore it. It’s not just an altruistic move. By protecting the Puerto Morelos reef, nearby businesses are protecting themselves. According to The Nature Conservancy, which designed the insurance policy, coral reef tourism generates around $36 billion for businesses around the world each year. Perhaps even more importantly to coastal businesses, reefs protect $6 billion worth of built capital (i.e. anything human-made) annually.

When a storm hits, the insurance company will pay out a claim in 10 days, according to Fast Company, providing an immediate influx of cash for urgent repair. (The insurance policy is tied to the event of a storm, not the damage, since it would be hard to immediately quantify the economic damage to a reef.) The corals that break off the reef can be rehabilitated at a nursery and reattached, but they have to be collected immediately. Waiting months for an insurance payout wouldn’t help if all the damaged corals have already floated away.

The insurance policy is one of many new initiatives designed to rehabilitate and protect endangered coastal ecosystems that we now know are vital to buffering the coast from storm surges and strong waves. Coral reefs aren’t the only protective reefs: In the eastern and southern coastal U.S., some restaurants have started donating oyster shells to help rebuild oyster reefs offshore as a storm protection and ecosystem rehabilitation measure.

Considering the outsized role reefs play in coastal protection, more insurance policies may be coming to ecosystems elsewhere in the world. Hopefully.

[h/t Fast Company]

SECTIONS

arrow
LIVE SMARTER
More from mental floss studios