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.
In the winter, for about five months or from January to May, the lake freezes over but the water is so clear that, from the surface, you can see an astounding 130 feet below you. Transparent and shining in a turquoise color, these masses of broken ice look like shards of glass rising into the sky. They are caused by the slow and unequal pressure in the main body of the packed ice as well as by the unequal structure and temperature.
Photography by Caras Ionut
Red Kite misjudges dive on a scrap of fallen meat only to be ambushed by a Canada Goose.
(photos by Craig Sluman)
HONK HONK MOTHERFUCKER
DO NOT fuck with Canada geese. They are crazy motherfuckers.
Ada the goldfish was disabled, so her mom built her this flotation device so she could get around
Defrosting a Building -: Icescapes Inside a Historic Chicago Cold Storage Facility.