Plants that keep their leaves will retain the ability to contribute to air purification and the screening off of areas even in winter. Even species that keep their leaves when they are no longer green in winter have an effect.

Evergreens can contribute to the mixing of polluted and clean air all year round. [Tonneijck et al., 2008]

Literature

• Tonneijck F., Vries B., Kuypers V. & DRO; Leidraad luchtzuiverend groen; Gemeente Amsterdam DRO (Dienst Ruimtelijke Ordening), Alterra, TripleE, Amsterdam, 2008