Air Pollution - Introduction

-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

-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

What is air pollution?

Air consists of gases and tiny particles of liquids and solids. It is made up of 78 percent of nitrogen, 21 percent of oxygen and 1 percent of a mixture of argon, neon, and carbon dioxide.

Air pollution occurs when impurities called pollutants are released into the air. Pollutants can occur naturally or as a result of human activities.

Natural pollutants include dust, smoke and ash caused by bush fire, ocean spray, pollen from flowers, insect droppings and mould growth.

A major source of human-caused pollution is the burning of fossil fuels (coal, oil, natural gas, petrol) for transport, electricity generation and industrial use.　

Pollution such as smoke, soot, dust, ash, mist and smog are visible. Pollutants such as gases and odour cannot be seen, but are still air pollution.

Associated diseases :
acute respiratory disease
acute cardiovascular disease
poor visibility

A threat to Hong Kong -
	disease linked to air pollution is already costing Hong Kong $3.8 billion a year in medical expenses
	lost productivity
	a reputation for poor air quality
	undermines the quality of life for every resident of Hong Kong