The present volume which is second in the series contains twelve articles/papers from leading research workers of China, Denmark, India, Kenya, 5. Korea and USA. The areas broadly covered are: air quality and vegetation; acidic deposition and plants; phototoxicity of NOx , O3 , SO2 and pollutant mixtures; pollution impact on forest trees; impact of O3 on photoasimilate partitioning; biochemical lesions in plants; lead pollution and plants; crop protection With paclobutrazol; microbiological resources; plant resistance to SO2 .