Final answer:
When smog lifts in Los Angeles, visibility increases due to fewer pollutants in the air, leading to clearer skies and better air quality. Smog consists of pollutants that can affect health, making smog-free days desirable. Indoors, pollutants like carbon monoxide can be detected by carbon monoxide detectors to prevent health hazards.
Step-by-step explanation:
When the smog lifts in Los Angeles, California, visibility improves significantly because there are fewer airborne particles and pollutants, such as nitrogen oxides and volatile organic compounds, that obscure the view. The absence of smog means that sunlight can travel through the air more easily without being scattered or absorbed by pollution. This leads to clearer skies and the ability to see farther. It also indicates improved air quality which is better for public health, as smog can exacerbate respiratory issues and other health problems.
Although the lesson also talks about indoor air pollution, which can be dangerous due to substances like mold, bacteria, radon and carbon monoxide, the focus of this question is on outdoor smog and its impact on visibility and health. Carbon monoxide is particularly dangerous because it is colorless and odorless, but can be deadly if inhaled as it replaces oxygen in the blood. Indoor air pollution can be mitigated with proper ventilation and carbon monoxide detectors.