Industrial smog, mainly from sulfur dioxide.

Another name for gray smog.

Photochemical smog, with nitrogen compounds giving it a brownish color.

Smog formed by sunlight reacting with pollutants.

Volatile Organic Compounds, released from vehicles, industrial processes, and even trees.

Ozone in the lower atmosphere; a key component of photochemical smog.

Smog from industrial emissions, especially from burning coal.

Smog formed when sunlight reacts with pollutants.

Sulfur dioxide, the main pollutant in industrial smog.

Nitrogen oxides, a main pollutant in photochemical smog.

Industrial smog, mainly from sulfur dioxide.

Another name for gray smog.

Photochemical smog, with nitrogen compounds giving it a brownish color.

Smog formed by sunlight reacting with pollutants.

Volatile Organic Compounds, released from vehicles, industrial processes, and even trees.

Ozone in the lower atmosphere; a key component of photochemical smog.

Smog from industrial emissions, especially from burning coal.

Substances formed when VOCs react with NO, disrupting ozone breakdown.

Nitrogen oxides, key pollutants in photochemical smog.

Sulfur dioxide, the main pollutant in industrial smog.

1. $NO_2$ breaks down into NO + O (sunlight). 2. O + $O_2$ → $O_3$ (sunlight). 3. VOCs react with NO, forming photochemical oxidants. 4. $O_3$ + oxidants = smog.

$O_3$ + NO → $NO_2$ + $O_2$

1. $SO_2$, particulate matter, and $NO_x$ are released. 2. Pollutants react to form sulfuric acid, particulate matter, and nitrogen dioxide. 3. This mix creates the thick haze.

Sunlight breaks $NO_2$ into NO and O; the free oxygen (O) combines with atmospheric oxygen ($O_2$) to form ozone ($O_3$).

VOCs react with NO, forming photochemical oxidants that prevent NO from reacting with ozone.

Ozone reacts with NO to form $NO_2$ and $O_2$, reducing ozone levels.