Increasing atmospheric carbon dioxide levels can boost plant growth and carbon storage on land, potentially slowing down climate change by creating a carbon sink. Research indicates that around half of the global increase in plant growth is due to rising carbon dioxide levels. The evidence shows a significant growth in global photosynthesis since before industrial times. Various sources, like carbon budgeting and forest data, suggest a historical increase in carbon storage on land mainly driven by rising carbon dioxide levels. However, uncertainties remain, especially regarding plant mortality and soil carbon responses to increased carbon dioxide. Overall, there is strong evidence supporting the idea that increasing carbon dioxide levels are leading to a terrestrial carbon sink, even though the exact impact and the influence of other factors are still uncertain.