In the decades since, its role has expanded to cover the entire global energy system, encompassing traditional energy sources such as oil, gas, and coal as well as cleaner and faster growing ones such as solar PV, wind power and biofuels. As the Covid-19 pandemic set off a global health and economic crisis in early 2020, the IEA called on governments to ensure that their economic recovery plans focus on clean energy investments in order to create the conditions for a sustainable recovery and long-term structural decline in carbon emissions.