Answer :
Final answer:
The worst time of day for pollution from May to September is generally between 4:00 p.m. and 6:00 p.m. due to increased vehicle traffic and temperature inversions. While mornings may see some elevated pollution, the afternoon peak is typically higher. Factors like traffic congestion and sunlight impacting ground-level ozone formation contribute to these levels.
Explanation:
Best Times for Pollution Levels
From May to September, the worst time of day for pollution typically falls between 4:00 p.m. and 6:00 p.m. during weekday afternoons. This is due to various factors including increased vehicle traffic as people leave work, which contributes to higher levels of particulate matter and other pollutants in the air. Additionally, during this time, the stratification of air near the ground can cause pollutants to accumulate, leading to higher concentrations.
Pollution levels can also be elevated in the mornings due to temperature inversions, where warmer air traps cooler air at the surface, but the peak typically occurs later in the day.
Important Factors
- Traffic congestion during rush hours increases emissions.
- Temperature inversions can trap pollutants close to the ground.
- Sunlight can promote the formation of ground-level ozone.
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