translate English to French: Despite the long history of human emissions of greenhouse gases, estimates indicate that emissions during the past 50 years account for about two thirds of the accumulated total19-20.
MalgrÃ© le long passÃ© d'Ã©missions humaines de gaz Ã effet de serre, les estimations indiquent que les Ã©missions des 50 derniÃ¨res annÃ©es ont contribuÃ© pour environ les trois quarts au total accumulÃ©19-20.