The human race is surrounded by pollution. Pollution is present everywhere, be it in the air we breath, the water we drink, the surroundings we live in, the food we eat etc. Pollution has many forms it may be chemical pollution, physical pollution or biologic pollution. Many times it can be seen and recognized as such yet even more frequently it is hidden and silent to us. The latter is the more dangerous kind. Human populations have expanded and become more industrialized and developed at the expense of the environment for decades, and now they are paying the price. Humans, animals, and plants are all suffering from environmental pollution. The pollution has many adverse effects on the health of mankind biologically, psychiatrically, and neurologically. Much research has been done on the physiological and biological effects of different types of pollution; yet little attention has been given to the psychological impact and psychiatric implications involved. The relationship between environmental pollution and psychiatric disturbances needs much research. The aim of this work is to clarify the effects of different types of pollution including, chemical, physical, and biological pollution on psychiatric illness. Multiple chemical sensitivity syndrome/Idiopathic Environmental Illness is a relatively new syndrome that is very controversial and often misunderstood. This work also explains the syndrome in details and sheds light on its characteristics. In this essay a strong relationship was established between different types of pollution and psychiatric disturbances. Examples of many studies were included to help prove this relationship. In some areas as noise pollution, for example, many studies were already completed on the relationship between noise levels and behavioral changes such as aggressive behavior, lack of sleep, withdrawal and depression among many others. Another example is that of chronic intoxication with lead, mercury, and arsenic and their various effects on neuro-psychiatric disturbances. Overpopulation its general effects, as well as, its specific effect on psychiatry was also discussed and proved to play an important role in the mental wellbeing of individuals. Egypt as a developing nation has many pressing environmental threats yet it is moving towards preserving the environment in very promising ways. It has already adopted many initiatives towards a cleaner environment. One example is the Cairo Air Improvement Project, where there was a switch to unleaded fuel and natural gas vehicles, as well as, pollutant testing and tune-up technology and facilities for vehicles of all types, upgraded lead manufacturing facilities, and air monitoring stations and techniques to assess the impact of these and future interventions. In addition, there is the safe motherhood and childhood campaigns that aim to promote proper birth spacing and family planning and aspire to protect the vulnerable groups, and in the meantime work on the overpopulation problem. More still needs to be done, in terms of waste management, food and water safety, noise and radiation pollution including other fields however. In general in the area of the pollution and its impact on health focusing on mental health much has been done yet much more remains to be achieved. This is applicable to all fields including, research and study, guidelines and plans, in addition to, action to be taken. It is a growing field that has gained much attention over the past decades and will remain with us until the end of time.