On year-by-year basis you're looking at noise. On decade basis there's mostly steady acceleration of CO2 concentrations in the atmosphere: https://gml.noaa.gov

On year-by-year basis you're looking at noise. On decade basis there's mostly steady acceleration of CO2 concentrations in the atmosphere: https://gml.noaa.gov/ccgg/trends/gl_gr.html https://gml.noaa.gov/ccgg/trends/gl_gr.html Lower growth may also be corellated with human depression, strife and war. So the human systems are working against decrease of CO2 growth.