Green walls can reduce urban air pollution Scientists prove
It has long been known that in densely populated cities air quality is a major concern as a result of industrial activities and the work of transport into the atmosphere harmful chemicals. However, according to recent studies, the solution of this problem may be planting trees, shrubs and other plants of the concrete jungle.
The scientists, in collaboration with the Universities of Birmingham and Lancaster came to the conclusion that the so-called green walls can be very effective in cleaning the polluted urban air. Moreover, they believe that local authorities should allocate money to design, grow and care for "walls" of herbs, climbers, etc. Obviously, the preference should be given to such environmentally acceptable "walls" and not traditional parks and gardens, for two main reasons.
First, the parks and gardens absorb harmful chemicals only at low altitude, and more precisely in the area of their crowns, while the innovative "green wall" can absorb various gases which do not accumulate near the surface. Green walls are also compact and do not take up much space, so that their location does not need a strong intervention in urban development.
Professor Rob McKenzie of the University of Birmingham explains the principle: "Until now, any initiative to reduce pollution was taken down — collection of old cars, the installation of catalytic converters in the exhaust system, the congestion charge in congested areas. Not all these measures produce the desired effect. " However, according to McKenzie, "green wall" to be much more effective than the above. According to preliminary reports, they will reduce air pollution by 30%.
In another study, the effectiveness of the vertical green spaces can reach 40% in the control of nitrogen oxide, and as much as 60% against the smaller powders. Previously, it was assumed that the efficiency of urban greenery does not exceed 5%. Given the fact that in the UK alone each year from diseases related to air pollution, the premature death of 35 to 50 thousand people, any, even the somewhat unexpected form to combat this pollution, should be welcomed and implemented.