"Timber alone cannot get us out of this mess"
Concrete as well as timber will be required to address the twin challenges of averting climate disaster and building the infrastructure the world needs, writes Philip Oldfield as part of our Timber Revolution series. More
Seven principles for designing low-carbon skyscrapers
Despite growing concerns about the carbon emissions associated with their construction and operation, skyscrapers continue to spring up around the globe. Here, Philip Oldfield sets out seven ways to design tall buildings that are more sustainable. More
"We must do better than 1,000 Trees"
Although adding trees to buildings can have real value, at Thomas Heatherwick's recently opened 1,000 Trees, the carbon costs outweigh the environmental benefit, says Philip Oldfield. More