The dominant greenhouse gases contributing to climate change are carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). Carbon dioxide is primarily released through the burning of fossil fuels and deforestation, while methane is emitted during agricultural practices, landfills, and fossil fuel extraction. Nitrous oxide is released from agricultural fertilizers and industrial processes. These gases trap heat in the Earth's atmosphere, leading to the greenhouse effect and global warming, significantly impacting weather patterns and ecosystems.