This book describes the continuous observation of prominent trace gases O3, and its precursors like NO, NO2, NOx, CH4 and Total NMHCs that significantly influence the air quality over Kannur, a coastal region in South India. Ozone being a prominent greenhouse gas, it plays a vital role in modifying the chemistry of the atmosphere by which it induces climate changes. Further, this highlights abrupt variations of O3, and NOx in the context of varying meteorological parameters during the annular solar eclipse on 15th January 2010. Likewise, air pollution formed out of the coordinated fireworks episode during festival seasons at Kannur is extensively discussed. The classification of hazardous organic emission during intense nighttime fireworks throws light on the nighttime chemistrythat influences the dynamics of the atmosphere.