This volume includes eight chapters that present recent advances in environmental research. Chapter One gives a detailed explanation of humic substances. Chapter Two explores the impact of built environment variables on air quality and transport choices. Chapter Three focuses on genetic engineering improvement for bioremediation and the feasibility of low-cost technology for algal biomass utilization. Chapter Four reviews the biodegredation of pollutants and removal of metals in constructed wetlands and microbial fuel cells. Chapter Five concerns the recycling of lithium-ion batteries from electric vehicles. Chapter Six deals with the impact of chlorides on drinking water safety. Chapter Seven explores the food security context under the constraints of climate change on rural farmers in Hadejia River Basin, northwestern Nigeria. Finally, Chapter Eight provides a review on the application of Dimethylether for enhanced oil recovery.