The environmental profile of the Chisenhale Primary School playground is heavily influenced by use of 2652 kg of steel for the frames and other elements. The use of 1,495 kg of thermally-modified American tulipwood and American ash for the panels mitigates the environmental footprint of the steel in some impact categories, notably Global Warming Potential. Both timbers are readily available in the U.S. forest and have been under utilised in recent years. A total of 2.56 tonnes CO2 equivalent is sequestered in the American hardwood slats installed in the playground. The thermal-modification process, which enhances the durability of the hardwood, and the quality of the design suggest the structure will remain in place and act as a carbon store for many years.