This week temporary forests were installed in London and Vienna

This week on Dezeen, Es Devlin created the Forest for Change at the London Design Biennale and Superflux installed fire-blackened pine trees at the Vienna Biennale for Change 2021.
British designer Devlin filled the courtyard of Somerset House, which is the main venue of this year's London Design Biennale, with 400 trees to draw attention to the UN Sustainable Development Goals.
These goals are displayed on colourful mirrored pillars arranged in a clearing at the centre