OBR: Fiscal Risks 2021

The Office for Budget Responsibility calculated that the UK’s debt:GDP ratio could rise to 350 to 400% without action to stop climate change. If progress is delayed until 2030, GDP would be 3.2% lower by 2050 and double the costs of meeting our climate targets, following a period of economic disruption which peaks at 6.6% of GDP loss in 2033-34.