Deforestation significantly impacts carbon dioxide levels by reducing the number of trees available to absorb this greenhouse gas during photosynthesis. As forests are cleared for agriculture, logging, or urban development, the carbon sink capacity decreases, leading to an increase in atmospheric CO2. This rise in carbon dioxide contributes to global warming and climate change by enhancing the greenhouse effect. Consequently, deforestation is a critical factor in environmental discussions, as it threatens not only climate stability but also biodiversity and ecological balance.