4032.jpg?width=1020-quality=45-auto=format-fit=max-dpr=2-s=e0b2b288c850e5797243ea31dd7faa58
4032.jpg?width=1020-quality=45-auto=format-fit=max-dpr=2-s=e0b2b288c850e5797243ea31dd7faa58

Insect-attracting wildflowers are being planted at the base of trees instead of surrounding them with pavement or grating. Photograph: Lorena Escuer/Hydrobiology/Handout

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