Nonmetal oxides are chemical compounds formed when nonmetals react with oxygen. Common examples include carbon dioxide (CO₂), sulfur dioxide (SO₂), and nitrogen oxides (NOx). These compounds typically have low melting and boiling points and can exist as gases or liquids at room temperature. They play significant roles in various natural processes and industrial applications. In the environment, nonmetal oxides can contribute to air pollution and climate change. For instance, carbon dioxide is a greenhouse gas that traps heat in the atmosphere, while sulfur dioxide can lead to acid rain. Understanding these compounds is essential for addressing environmental issues and developing sustainable practices.