This document provides a comprehensive review of data mining techniques that can be used to predict benzene (C6H6) levels in the air without using sensors. It first discusses several data mining algorithms like decision trees, support vector machines, and random forests. It then reviews literature where researchers have used techniques like neural networks, neuro-fuzzy systems, and ensemble methods to predict various air pollutants. Most studies found that tree-based models like random forests performed best. The review aims to evaluate techniques for predicting benzene, a hazardous air pollutant linked to cancer, to improve public health.