This document discusses cities that experience smog problems such as London, Mexico City, Tehran, LA, and Beijing. It then lists potential solutions to reduce smog like using catalytic converters, vapor recovery systems, renewable energy sources, and limiting access of polluting vehicles in cities.

6. Where Smog happens
● London (1952 12,000)
● Mexico City
● Tehran (2005 1600)
● LA
● Beijing

8. Solutions?

9. ● Catalytic converters
● Vapour recovery/ Conservation systems
● Use of renewable sources of energy
● Limiting access of poluting vehicles to cities

10. ● Catalytic converters
● Vapour recovery/ Conservation systems
● Use of renewable sources of energy
● Limiting access of poluting vehicles to cities