IB ESS HL 8.3.9 Smog intensification factors Question Bank
Practise IB ESS HL 8.3.9 by applying smog intensification factors concepts to exam-style environmental systems questions.
- Syllabus
- First assessment 2026
- Course
- ESS HL
- Level
- HL
Practise IB ESS HL 8.3.9 by applying smog intensification factors concepts to exam-style environmental systems questions.

Figure Mean monthly regional changes due to the \(\mathbf{2 0 2 0
Tropospheric ozone is a major component of photochemical smog. Outline two conditions that contribute to high levels of photochemical smog in an area.
a. topographic conditions: next to mountains / in a depression/low-lying area traps pollution;
b. climatic conditions: high pressure systems / weak winds / temperature inversions / high insolation / limited rainfall / high temperature;
c. high population urban density: heavy use of fossil fuels due to high vehicle use/industrial output / evaporation of paint and cleaning (VOC- releasing) products;
d. burning of forests increases the formation of primary pollutants that contribute to smog;