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 of the forest.
Also aiming to draw attention to the impact of climate change, design studio Superflux installed 415 trees that had been damaged by forest fires around an oasis of living plants.
Called Invocation for Hope, the installation was created at the Museum of Applied Arts in Vienna as part of the Vienna Biennale for Change 2021.
In London, ex-students of leading architecture school the Bartlett came forward with allegations of sexist and racist treatment.
The school said it was "aware of the issues" and was set to begin an investigation.
In the USA, Studio Gang completed a residential skyscraper with angled glass elements that overlooks Forest Park in St Louis, Missouri.
Also in America, Kohn Pedersen Fox unveiled plans for a supertall skyscraper that will be built near Grand Central Terminal in New York.
As Venice Architecture Biennale continues we rounded up ten of the most interesting pavilions that are worth making a trip to see.
Highlights include a pavilion decorated only with QR codes, a Garden of Privatised Delights, segments of London mosques and the wooden frame of a four-storey house.
Popular projects this week included an apartment building in Mexico City built around a "secret garden", a Spanish music school wrapped in a perforated metal skin and a Menorcan holiday home.