A major greenhouse gas contributing to climate change is carbon dioxide (CO2). It is released into the atmosphere primarily through human activities, such as burning fossil fuels for energy, deforestation, and industrial processes. CO2 traps heat in the atmosphere, leading to the greenhouse effect, which warms the planet. This increase in global temperatures can result in various environmental issues, including extreme weather events, rising sea levels, and shifts in ecosystems. Reducing CO2 emissions is crucial for mitigating climate change and protecting the environment.