It is surprisingly quiet inside the construction site of a high school extension in Sickla, a former industrial area in south Stockholm that is set to become part of the "largest mass timber project in the world." "It's a fantastic working environment no concrete dust, no silica dust issues. It's clean and quiet," said Niklas Häggström, the project area manager at Atrium Ljungberg, and responsible for the realisation of the entire Wood City project, when we walk around the site. In total, 25 neighbourhoods will cover 25 hectares. The first buildings are scheduled for completion in 2025, with the next phase " including 2,000 homes " planned for 2027. It is an enormous project, but with timber Atrium Ljungberg can build 1,000 sq metres a week. In 2022 Atrium Ljungberg set an ambitious goal to become climate neutral by 2030. Just by choosing timber as the structural material, the company has said it reduces its climate impact by about 40%, a claim backed up by researchers at Linköping University. If other companies were to follow suit, one study found that building with wood instead of concrete and steel in 80% of new buildings would help offset half of Europe's construction industry emissions. Another study found that wooden buildings continue to be climate friendly " a four-storey wooden building results in a net uptake of 150 tonnes of carbon dioxide. The hope is that the city will also improve the wellbeing of the people inside the buildings.