Why does the lowest layer of the atmosphere often look hazy?

The lowest layer of the atmosphere, known as the troposphere, often appears hazy due to the presence of airborne particles, such as dust, smoke, and water vapor. These particles scatter sunlight, creating a diffuse effect that reduces visibility. Additionally, temperature inversions can trap pollutants close to the ground, leading to increased haze. Humidity can also contribute to the formation of fog or mist, further enhancing the hazy appearance.