One of the major obstacles to decreasing atmospheric CO₂ is that natural processes that sequester carbon occur at much longer time scales than human processes that add CO₂ to the atmosphere.

Question

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Natural processes for carbon sequestration, such as photosynthesis, sedimentation, and rock weathering occur over longer timescales of hundreds to thousands of years, whereas human activities like burning fossil fuels and deforestation release carbon into the atmosphere much more quickly. This makes it challenging to mitigate the increasing levels of atmospheric CO2.

One of the Major Obstacles to Decreasing Atmospheric CO2 Is

One of the Major Obstacles to Decreasing Atmospheric CO₂ Is