We are surrounded by radiation, at home, at work and in the midst of nature. Some forms of radiation are natural, others are caused by our electromagnetic devices. All have non-negligible effects on our health. This book was written by a pupil of geo-biological pioneer De Hartmann. Its clear development will show you how to observe the effects of the environment on the health of living beings. The author tackles in turn cosmo-telluric radiation and radiation with technological origins. How do these radiations affect our body? How can we protect ourselves from them or limit their effects? How should we measure or reduce electromagnetic pollution of habitats? These are among the questions answered in this book. A wealth of easy-to-apply advice, explicit diagrams and photographs and numerous case studies are combined in this complete practical guide to improving your environment and well-being.