The green library is a new concept and it is gaining popularity among the library professionals. The paper highlights the conditions of environment, their impacts on society and efforts of leading organizations towards an eco-friendly earth, developed standards for the betterment, green India, green library, features of green library, Initiatives in India and outside India. The papers also discuss role of initiatives like United Nations Development Programme (UNDP), IGBC (Indian Green Building Council) and LEED (Leadership in Energy and Environmental Design).It also give an overview of green library and role of modern librarian to make green library. Furthermore the paper focus the importance of green library in ongoing era and green library initiatives in India.