Low dimensional structures confines the motion of the charge carriers in conduction band and valance band in all three spacial directions. The confinement of the charge particle leads to a promising changes in their physical, chemical, electrical, mechanical, and optical properties. Here, in this book, we emphasize the " green synthesis of fluorescent low dimensional carbon for white light emission and sensing". Green synthesis techniques were used for the synthesis of optically active carbon. Selective sensing of metal nanoparticle and use of the highly fluorescent carbon were also described in this book as a student approach.