This volume presents a collection of fully peer-reviewed papers on the latest advances in the field of urban air quality. These papers were presented at the Third International Conference on Urban Air Quality - Measurement, Modelling and Management, held in Loutraki, Greece, March 19-23, 2001. The conference provided a platform for 175 scientists from over 30 different countries to exchange, discuss and advance the latest research findings in this field. Papers were presented on topics including air quality management and policy, emissions, measurements of air pollution, local and urban scale modelling, aerosols, urban meteorology, remote sensing and exposure.
This work will prove useful to universities, environmental research organisations, research students, undergraduate students, environmental consultants, industrial organisations, and local (city) authorities.

Funding Science: An Immense Challenge The real challenge in science should be hypothesis formation, experimental design and conducting the actual research under rigorous control and experimental condi of tions with the best available equipment/infrastructure. However, in many parts the world, the real challenge in science is trying to obtain some minimal amount of funding to initiate research. Every country in the world is challenged with an im mense number of interconnected environmental and health problems. Examples in clude biologically and chemically contaminated water and soil, air pollution, waste and sewage treatment, a multitude of infectious diseases in humans, animals and plants, global change, population growth, alternate energy sources, deforestation, floods, crop production and so on. Solutions to these national and international problems require training and re search to ensure the best available people and knowledge are available to man age and/or solve these problems. This can only be accomplished if the research community has the funding to conduct priority research and apply the knowledge globally. The challenge in science should be discovering the unknown and col laborative research/training of new scientists. Too often the challenge is how to conduct research without proper support. Many scientists are likely of the opinion that it is not their jobs/careers that is stressful, but the inability to do their research properly, that is stressful. Good research in a knowledge based economy requires proper funding.