With a unique emphasis on net-zero emission approaches, this book delves into circular economy principles and sustainable energy materials, offering a comprehensive perspective on climate change challenges.

Ngoc Thanh Thuy Tran is an assistant researcher at the Hierarchical Green-Energy Materials (Hi-GEM) Research Center at the National Cheng Kung University, Taiwan.

Wei-Sheng Chen is an associate professor in the Department of Resources Engineering at National Cheng Kung University, Taiwan.

Shou-Heng Liu is a professor in Environmental Engineering at National Cheng-Kung University, Taiwan.

Jow-Lay Huang is a chair professor in the Department of Materials Science and Engineering at National Cheng Kung University, Taiwan.

1. Introduction. 2. Principles and Strategies of Circular Economy. 3. Advancements in Carbon Capture Technologies. 4. Mineral Carbonation of Alkaline Industrial Waste and Byproducts for CO2 Sequestration and Utilization. 5. Photo(electro)chemical Systems for Upcycling of Carbon-Containing Waste. 6. Tuning Light-Matter Interaction with Photonic Architectures for CO2 Reduction. 7. Water Chestnut Shell-Derived Carbons as Electrodes for Energy Applications. 8. Unlocking the Potential of Biomass Energy. 9. Challenges and Solutions in Hydrogen Energy. 10. Revolutionizing Energy Sustainability: Unleashing the Potential of rSOC Technology. 11. Application of Clostridium Butyricum to Enhance the in-situ Hydrogen Production and Dechlorination Efficiencies of Chlorinated-Solvent Contaminated Groundwater. 12. Recycling Batteries Materials. 13. Recycling Solar Cell Materials. 14. Recycling Fuel Cell Materials. 15. Concluding Remarks.