translate English to French: Their assessments indicate that this long term trend has occurred primarily due to rising concentrations of atmospheric aerosols released due to human activities.
Leurs Ã©valuations indiquent que cette tendance Ã long terme est imputable surtout Ã l'augmentation des concentrations atmosphÃ©riques d'aÃ©rosols libÃ©rÃ©s par les activitÃ©s humaines.