These vegetated surfaces don’t just look pretty. They have other benefits as well, including cooling city blocks, reducing loud noises, and improving a building’s energy efficiency.What’s more, a recent modeling study shows that green walls can potentially reduce large amounts of air pollution in what’s called a “street canyon,” or the corridor between tall buildings.
For the study, Thomas Pugh, a biogeochemist at the Karlsruhe Institute of Technology in Germany, and his colleagues created a computer model of a green wall with generic vegetation in a Western European city. Then they recorded chemical reactions based on a variety of factors, such as wind speed and building placement.
The simulation revealed a clear pattern: A green wall in a street canyon trapped or absorbed large amounts of nitrogen dioxide and particulate matter—both pollutants harmful to people, said Pugh. Compared with reducing emissions from cars, little attention has been focused on how to trap or take up more of the pollutants, added Pugh, whose study was published last year in the journal Environmental Science & Technology.
That’s why the green-wall study is “putting forward an alternative solution that might allow [governments] to improve air quality in these problem hot spots,” he said.Compared with reducing emissions from cars, little attention has been focused on how to trap or take up more of the pollutants, added Pugh, whose study was published last year in the journal Environmental Science & Technology.
That’s why the green-wall study is “putting forward an alternative solution that might allow [governments] to improve air quality in these problem hot spots,” he said.
Draco volans, or the Flying Dragon, is a member of the genus of gliding lizards Draco. It can spread out folds of skin attached to its movable ribs to form “wings” that it uses to glide from tree to tree over distances upwards of 8 metres (25 feet); however, like all modern reptiles, it lacks the ability to sustain powered flight, and is capable only of gliding. Its wings are brightly coloured with orange, red and blue spots and stripes, and they provide camouflage when folded. The flying dragon can reach lengths as long as 19 - 23 cm. It feeds on arboreal ants and termites.
Lone Indian Man Plants 1,360 Acre Forest single-handedly!! PLEASE SHARE!! A little over 30 years ago, a teenager named Jadav “Molai” Payeng began burying seeds along a barren sandbar near his birthplace in northern India’s Assam region to grow a refuge for wildlife. Not long after, he decided to dedicate his life to this endeavor, so he moved to the site where he could work full-time creating a lush new forest ecosystem. Incredibly, the spot today hosts a sprawling 1,360 acre of jungle that Payeng planted single-handedly.
It all started way back in 1979 when floods washed a large number of snakes ashore on the sandbar. One day, after the waters had receded, Payeng , only 16 then, found the place dotted with the dead reptiles. That was the turning point of his life.
“The snakes died in the heat, without any tree cover. I sat down and wept over their lifeless forms. It was carnage. I alerted the forest department and asked them if they could grow trees there. They said nothing would grow there. Instead, they asked me to try growing bamboo. It was painful, but I did it. There was nobody to help me. Nobody was interested,” says Payeng, now 47.
While it’s taken years for Payeng’s remarkable dedication to planting to receive some well-deserved recognition internationally, it didn’t take long for wildlife in the region to benefit from the manufactured forest. Demonstrating a keen understanding of ecological balance, Payeng even transplanted ants to his burgeoning ecosystem to bolster its natural harmony. Soon the shadeless sandbar was transformed into a self-functioning environment where a menagerie of creatures could dwell. The forest, called the Molai woods, now serves as a safe haven for numerous birds, deers, rhinos, tigers, and elephants — species increasingly at risk from habitat loss elsewhere.
Despite the conspicuousness of Payeng’s project, Forestry officials in the region first learned of this new forest in 2008 — and since then they’ve come to recognize his efforts as truly remarkable, but perhaps not enough.
“We’re amazed at Payeng,” says Assistant Conservator of Forests, Gunin Saikia. “He has been at it for 30 years. Had he been in any other country, he would have been made a hero.”
A macrophage (pale brown) interacts with Borrelia cells (blue), the spirochete bacteria that cause Lyme disease. Although the outer membrane of Borrelia contains a strong antigen, the OspC protein, the bacterium successfully evades the human immune system by hiding out in places less accessible to immune cells, such as the central nervous system.
2012 marked the 40th anniversary of the Clean Water Act, which established regulations for the discharge of pollutants to waterways and supported the building of sewage treatment plants. Despite these advances, sewage remains a major source of pharmaceuticals and personal care products (PPCPs) and naturally occurring hormones found in the environment.
Many rural communities in the U.S. use aerated lagoon systems to treat their wastewater. The wastewater is pumped into at least one manmade aerated lagoon, in which oxygen-loving and anaerobic microorganisms remove many of the contaminants. The water is then pumped into a series of other lagoons. Finally, the resulting water, known as the effluent, is discharged directly into a receiving stream.