Carbon dioxide enrichment is a research area that focuses on increasing the concentration of carbon dioxide in the atmosphere in order to study its effects on plant growth and productivity. This research is often conducted in controlled environments such as greenhouses or growth chambers to simulate the elevated levels of carbon dioxide that are expected to occur due to human activities such as the burning of fossil fuels. Studies in this area have shown that increased levels of carbon dioxide can stimulate plant growth, increase photosynthesis rates, and improve water use efficiency. This research is important for understanding how plants will respond to future climate change and for developing strategies to increase agricultural productivity in a changing environment.