This urgent and essential text explores what could be classed as one of today's most pressing problems.It is the goal of environmental security to protect people from the short- and long-term ravages of nature, man-made threats and the deterioration of the natural environment.Environmental security includes activities related to pollution prevention, environmental conservation, compliance with regulations and environmental restoration.It is a challenge for transition countries to support all of these activities, due to limited resources, competing priorities and the fact that most environmental regulations, assessment methods and procedures, and restoration techniques were developed in countries where resources were not limited.

This urgent and essential text explores what could be classed as one of today's most pressing problems.It is the goal of environmental security to protect people from the short- and long-term ravages of nature, man-made threats and the deterioration of the natural environment.Environmental security includes activities related to pollution prevention, environmental conservation, compliance with regulations and environmental restoration.It is a challenge for transition countries to support all of these activities, due to limited resources, competing priorities and the fact that most environmental regulations, assessment methods and procedures, and restoration techniques were developed in countries where resources were not limited.

This is the first book aimed at developing a common language among scientists working in the field of Phytoremediation. Authors of the main chapters are leading scientists in this field: some of them were among the first to have suggested the use of hyperaccumulator plants for extraction of metals from soils. Members of an EU funded research project on the feasibility of phytoextraction of metals (PHYTOREM project) from contaminated soils were also among the lecturers. Manuscripts based on the lectures presented at the ASI were revised to take into account ASI participantsa (TM) comments and suggestions, and went through a round of peer review and editing. Discussion summaries and practical recommendations, emanating from the working group and round table discussions, are provided in separate chapters at the end of the book.

The science of ecotoxicology and the practice of ecological risk assessment are evolving rapidly. Ecotoxicology as a subject area came into prominence in the 1960s after the publication of Rachel Carson's book on the impact of pesticides on the environment. The rise of public and scientific concern for the effects of chemical pollutants on the environment in the 1960s and 1970s led to the development of the discipline of ecotoxicology, a science that takes into account the effects of chemicals in the context of ecology. Until the early 1980s, in spite of public concern and interest among scientists, the assessment of ecological risks associated with natural or synthetic pollutants was not considered a priority issue by most government. However, as the years passed, a better understanding of the importance of ecotoxicology emerged and with it, in some countries, the progressive formalization of an ecological risk assessment process. Ecological risk assessment is a conceptual tool for organizing and analyzing data and information to evaluate the likelihood that one or more stressors are causing or will cause adverse ecological effects. Ecological risk assessment allows risk managers to consider available scientific information when selecting a course of action, in addition to other factors that may affect their decision (e. g. , social, legal, political, or economic). Ecological risk assessment includes three phases (problem formulation, analysis, and risk characterization).