The UK Parliament’s cross-party Environmental Audit Committee has launched an inquiry into how HM Treasury influences government decision-making on climate change, nature loss and environmental sustainability, including whether fiscal rules and spending constraints limit investment in environmental policy and the UK’s ability to meet its legal environmental obligations. The inquiry will examine how the Treasury assesses the long-term economic risks of climate change and biodiversity loss, and whether factors such as sustainability and natural capital inform decisions alongside traditional measures such as gross domestic product (GDP). It will also consider the extent to which environmental duties, including the Environmental Principles Policy Statement, are applied in Treasury policy decisions and review progress on implementing recommendations from the Dasgupta Review on the Economics of Biodiversity.