The air in earth's atmosphere is vital to living things; but people are polluting this clean, fresh air. Air pollution harms plants, animals and humans. It is even changing earth's climate. For centuries, people have produced small amounts of air pollution - but now we are producing far, far more. This book looks at how human life changed to bring about this increase; at what makes smog form in our cities and acid rain fall on our forests; and at how air pollution is connected to global warming. It also looks at what you, the reader, can do to help and start to improve YOUR environment today. Throughout, 'Fact Panels' give stark statistics to highlight the problems and 'Try This!' panels give the reader simple activities which they can do to investigate the issues. These books are also weblinked which means that the reader is directed to specially selected websites where they can find out more.