That means four years of current emissions. If you go by Pierce Pierce Forc's recent paper, it's only about two and a half years of current emissions. If you look at the reduction rate here, these are global reduction rates. We'd have to bring emissions down at around about 20% every single year.
for - stats - climate crisis - decarbonization - 2025 - 2.5 to 4 years of carbon budget remaining for 1.5 Deg C - 20% per annum decarbonization rate