Minimise the amount of impervious/paved surface area
Not only horizontal surfaces such as paving at ground level and roofs, but also vertical surfaces (facades, noise barriers) can be made permeable. In general, the following rule applies: the rougher the surface, the greater the effect. A field of flowers does more than a grass lawn, and bushes have a greater effect than a stand of herbaceous plants. The biggest effect on air quality is most likely through the reduction in the disturbance of precipitated particle matter. If there is a lack of space at ground level, green facades can be used. These contribute to the capture of particle matter, though mainly to the lowering of the atmospheric temperature.