Sentence examples for smog levels from inspiring English sources

Pollution and smog levels dropped.

For years, smog levels have been measured in hourly averages.

Toxic emissions declined by half; days of dangerous smog levels declined by two-thirds.

Seasonal changes, especially warm weather, do, of course, affect smog levels.

Weather is a major factor affecting smog levels in the Chinese capital.

It had 38 days in which smog levels exceeded federal standards.

The presence of such heat islands increases energy use and raises smog levels.

Smog levels are actually lowe than they have been in recent weeks.

Mexico City used to regularly reach high smog levels, but air quality has improved significantly since the 1990s.

More than 100 major cities now exceed the maximum permissible smog levels at some point during the year.

Smog levels dropped significantly during Easter Week, when much of Mexico City empties out due to the holiday.