Air pollution has been an issue that the modern world has resolved to a greater extent, it still appears to have considerable influence on the global environment. In many countries with ambitious economic growth targets the acceptable levels of air pollution have been transgressed, resulting in an urban skyline characterised by smog and dust clouds. This book provides a comprehensive compilation of chapters, in which the investigation of size segregated atmospheric particulate samples and their elemental analysis, meteorological influences on them in several cities in Malaysia, are reported. The book consists of eight chapters mainly consist of chapters describing the research findings in air quality monitoring and elemental analysis in three cities in Malaysia. The book seeks to provide reference materials and information to environmental scientists, engineers, researchers and students with the air pollution case studies in these Malaysia cities in previous years.