Puthalpet Jayarama Reddy is active renewable energy and environment professional. Former Professor of Physics and Vice chancellor, Sri Venkateswara University, India, his research interests include temperature and high pressure effects of crystals/materials, IR, and solar PV materials and thin film solar cells. He was Post-doctoral Research Associate, Dept. of Materials science and engineering, Cornell university (US), Commonwealth Visiting fellow, Imperial college, London (UK), Indo-Czech Exchange fellow, Charles university, Prague, and Guest Professor, Institute of Physical Electronics, Stuttgart university (Germany). Presented papers in several Intl conferences, delivered invited lectures and published along with his students in Intl journals. His earlier books (BS Publ. Hyderabad and CRC Press of the Taylor & Francis group, Netherlands, UK, USA), are Science and Technology of Photovoltaics (1st & 2nd edns); Introduction to Environmental Science (1st & 2nd edns); Municipal Solid Waste Management; Pollution and Global warming; Solar Power Generation - Technology, new concepts and policy; Clean Coal technologies for Power generation (in English & Chinese); Energy recovery from MSW by Thermal conversion technologies; and The Daunting Climate Change. He produced several videos/podcasts on climate change. He is passionate about the development and usage of clean energies and their effective role in mitigating carbon emissions; and lectures on these aspects.