This text presents green chemistry as an exciting area of research rather than as a closed body of knowledge. It provides a lucid introduction to the concepts of green chemistry and demonstrates the principles with excellent illustrations. It contributes an up-to-date and extensive account of green solvents, catalysis, examples for green synthesis with real-world cases, alternative sources of green energy, and prominent greener technologies (Microwave, Ultrasound, Ball Mill) with applications. The text elaborates on green routes for the synthesis of a series of bioactive natural products and pharmaceutical. It focuses on comparisons between traditional and green protocols with several examples. This book is suitable for the syllabi of various universities under the CBCS and LOCF schemes and those students who are preparing for competitive examinations such as NET (UGC-CSIR), GATE, SET, etc.