The global environment has been rapidly deteriorating because of global warming, and a large population is facing severe water and food shortages. In addition to global warming, soil and groundwater contamination by heavy metals such as lead, arsenic, and chromium due to industrial development and excessive use of pesticides is also rapidly increasing. Remediation is necessary for replenishing drinking water and food, and remediation using microorganisms (bioremediation) and plants (phytoremediation) is one of the most feasible and economical methods. This book deals with strategies for efficient bioremediation and phytoremediation procedures. The authors discuss effective remediation technology, thus providing important information and new ideas for fighting the deterioration of our global environment.