~Air Pollution~

-Introduction

-Pollutants
 ~Sulphur dioxide
 ~Nitrogen dioxide
 ~Carbon monoxide
 ~Ozone
 ~Particulates
 ~Lead

-API
 ~What's API?
 ~In Hong Kong
 ~Equipment
 ~API figures

-Photochemical Smog
 ~What is it?
 ~Problems
 ~Effects

-Acid Rain
 ~How it is formed?
 ~Effects

-Global warming
 ~Greenhouse effect
 ~Effects
 ~What can you do?

-Measures
 ~Part 1
 ~Part 2
 ~Part 3
 ~What can you do../1
 ~What can you do../2

Characteristics: 
It can accumulate in the human body until the level is dangerous to health.

Source: 
It mainly comes from combustion of leaded petrol

Effect: 
It causes anaemia and damages the nervous system, especially in children.