In this book, Chapter One reviews the environmental impact -on human health, natural systems and natural resources- in physical units and outlined the limitations and the challenges that are derived from an ecosystem service valuation based on monetary values -including ecosystem disservices with associated negative monetary values. Chapter Two is focused on the analysis of TES technologies that provide a way of valorising solar heat and reducing the energy demand of buildings. Chapter Three investigates the prospects of a key enabling technology for large-scale injection of wind turbine energy to the electric power grid. Chapter four discusses how simple wet acid surface texturing methods for green energy-silicon solar energy are marked aim to provide the vital information about the growing field in solar energy with an environmental friendly nature. Chapter Five verifies the improvement performance by various components of the Enhance PSO, the ICA and the Wavelet in the forecasting frameworks. Chapter Six presents predictive current control(PCC) strategy for back-to-back connected voltage source converter employed in PMSG wind energy conversion systems.