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TERI Energy and Environment Data Diary and Yearbook (TEDDY) is an annual publication brought out by The Energy and Resources Institute (TERI) since 1986. It is the only comprehensive energy and environment yearbook in India which provides updated information on the energy supply sectors (coal and lignite, petroleum and natural gas, power, and renewable energy sources), energy demand sectors (agriculture, industry, transport, residential, and commercial sectors), and environment (local and global). It also provides a review of the government policies that have implications on energy and environment in India.

Each edition of TEDDY contains India’s commercial energy balances for the last four years that provide comprehensive information on energy flows within different sectors of the economy and how they have been changing over time. These energy balances and conversion factors are a valuable reference for researchers, scholars, and organizations working on energy and related sectors. After the introductory chapters, TEDDY has been divided into sections on energy supply, energy demand, and local and global environment. The twenty-ninth edition of the publication, TEDDY 2014/15, comes with several interesting features. The Green Focus at the end of each chapter highlights sustainable initiatives and successful practices. The publication also features a section with a discussion around sustainable development goals and tracking framework for sustainable energy goals at global, national, and sub-national levels.

Graphs, maps, and tables have been used in all chapters to explain facts, which make the book an interesting read. In addition, detailed tables at the end of each chapter represent statistical data on energy and environment. The publication is accompanied by a complimentary CD containing full text. The publication is cited in international peer-reviewed journals and policy documents.