Trace gases are small amounts of gases found in the Earth's atmosphere that play important roles in various processes. Although they make up only a tiny fraction of the atmosphere, these gases, such as carbon dioxide, methane, and nitrous oxide, can significantly impact climate and air quality. They are often produced by natural sources like volcanoes and wetlands, as well as human activities like burning fossil fuels and agriculture. These gases are crucial for maintaining the Earth's temperature and supporting life. For example, carbon dioxide helps trap heat in the atmosphere, contributing to the greenhouse effect. Understanding trace gases is essential for addressing climate change and improving environmental health, as their concentrations can influence weather patterns and ecosystems.