What will happen to the concentration of carbon dioxide in the atmosphere if lots of trees are cut down?

If a significant number of trees are cut down, the concentration of carbon dioxide (CO2) in the atmosphere is likely to increase. Trees absorb CO2 during photosynthesis, so their removal reduces the planet's capacity to sequester carbon. Additionally, the decomposition or burning of the cut trees releases stored CO2 back into the atmosphere, further contributing to higher levels of this greenhouse gas and exacerbating climate change. Overall, deforestation leads to a net increase in atmospheric CO2 concentrations.