Investment in energy efficiency worldwide is on course to fall by 9% in 2020, the International Energy Agency (IEA) forecasts, warning that the Covid-induced slump threatens international climate goals. The agency’s ‘Energy Efficiency 2020’ report estimates that global primary energy intensity will improve by less than 1% this year, its weakest rate in a decade and well below the level of progress needed to meet climate, pollution-reduction and energy-access targets.