Muren van groen in de stad reduceren vervuiling met 30 procent

AMSTERDAM – Het bouwen van ‘groene muren’ in steden blijkt veel beter te werken om vervuiling tegen te gaan dan eerder gedacht. Onderzoekers van de universiteit van Lancaster denken dat 30 procent van de vervuiling kan worden gereduceerd met meer groen in steden.

Eerder werd altijd aangenomen dat planten in steden de vervuiling met 1 tot 2 procent terugdringen. In het onderzoek van de Britse wetenschappers werd geconcentreerd op de vervuiling in smalle straten.

Met computermodellen wisten de onderzoekers het effect van vergroening op de zijmuren van smalle straten te vergelijken met planten op het dak op in parken.

Overweldigende winnaars

Zogenaamde ‘groene muren’ kwamen uit de bus als overweldigende winnaars als om aankomt op het reduceren van stadsvervuiling. Ook bomen op de begane grond kunnen effectief zijn om vervuiling tegen te gaan, maar alleen als de toppen er niet voor zorgen dat vervuiling op grondniveau vast blijft hangen.

Planten in steden reduceren het niveau van gassen zoals stikstofdioxide en fijnstof. Beidei stoffen zijn schadelijk voor de gezondheid en eerder schatte de Wereldgezondheidsorganisatie dat er per jaar 1 miljoen mensen te vroeg sterven door vervuiling in de steden.

Lees hier het gehele onderzoek

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