The layer of the atmosphere that is most strongly affected by conditions on Earth's surface is the troposphere. The troposphere is the lowest layer of the atmosphere, and it is where weather occurs. The temperature and pressure in the troposphere change with altitude and are affected by conditions on the surface, such as the presence of mountains, bodies of water, vegetation, and human activities. The troposphere contains most of the gases that make up the atmosphere, including water vapor, carbon dioxide, and oxygen.
