Radar techlogy is increasingly being used to monitor the environment. This mograph provides a review of polarimetric radar techniques for remote sensing. The first four chapters cover the basics of mathematical, statistical modelling as well as physical modelling based on radiowave scattering theory. The subsequent eight chapters summarize applications of polarimetric radar monitoring for various types of earth environments, including vegetation and oceans. The last two chapters provide a summary of Western as well as former Soviet Union kwledge and the outlook. This mograph is of value to students, scientists and engineers involved in remote sensing development and applications in particular for environmental monitoring.