What is the role of trees in relation to atmospheric CO2?

Trees play a crucial role in the carbon cycle, particularly in relation to atmospheric CO2. Through the process of photosynthesis, trees absorb carbon dioxide from the atmosphere and convert it into glucose and oxygen using sunlight. This process not only helps in reducing the concentration of CO2 in the atmosphere but also contributes to the growth and development of the trees themselves.

The intake of CO2 by trees is significant in combating climate change, as it helps lower greenhouse gas levels in the atmosphere. By sequestering carbon during photosynthesis, trees effectively act as carbon sinks, storing this carbon in their biomass (leaves, stems, roots) and in the soil, where it can remain for years or even centuries.

In contrast, the other options do not accurately represent the role of trees. Trees do not release CO2 through photosynthesis; instead, they release oxygen as a byproduct of this process. While trees do store CO2, they also absorb it, which makes statements about them only storing it without absorption incomplete. Lastly, the idea that trees do not affect atmospheric CO2 levels neglects the significant impact they have in reducing CO2 concentrations through their photosynthetic activity.