There is a need for an integrated approach to solving and mitigating environmental problems using colloid science technologies and considering the relationship between air, water and soil. This book covers basic to advanced topics on the use of colloidal materials and related technologies with emphasis on bio-based colloids. The introduction establishes the book scope and significance in the modern world including information on current applications of colloidal materials to environmental sustainability, basic concepts in colloidal science focused on the relevant physical chemistry such as surface tension, surface energy, self-assembly mechanisms, colloid stability and the main aspects related to their safe application. The following chapters are organized according to three main topics: application of colloids for air, water and soil monitoring and sustainable remediation. Contributing to the understanding of how colloidal materials can be used now and, in the future, to solve environmental problems, this book will be of interest to a broad audience, from material scientists to environmental scientists.