The factor that contributes to the greenhouse effect on Earth's climate is the accumulation of greenhouse gases in the atmosphere. These gases, including carbon dioxide, methane, and nitrous oxide, trap heat from the sun, keeping the planet warm enough to support life. However, human activities, such as burning fossil fuels, deforestation, and industrial processes, have significantly increased greenhouse gas concentrations, leading to enhanced greenhouse effect and global warming. Understanding this phenomenon is vital for addressing climate change and developing mitigation strategies.