@human3500 @pfsmet we're not thinning it we're adding an IR absorber to it - one that doesn't naturally decay on reasonable time spans for human civilization or the homo sapiens species. That IR absorber significantly increases the capacity of the atmosphere to hold warmth on the surface. I'm 40 something years old and the majority of CO2 in the atmosphere has been added during my life-time. Changes like that have happened in the history of our ecosphere but they would usually take millions of years. Not 40.