It is difficult to examine the causal relation of pollution damages because time gap between pollution cause and effect is large and new pollutants are continuously produced. Their many environmental effects are not promptly studied. As both the study of causal relation about pollution and the pollutant treatment are highly advanced by the development of science and environmental technology, both economy and balance about environmental regulation may be discussed. It is reasonable to decide environmental policy in consideration of close relation between both the generation and resolution of environmental problem and of technological development because environmental problem is related to complicated social problem and scientific technology.
First item in policy decision about environmental control and management is preferentially to consider way of prevention. It is necessary to prevent pollution by regulating the installment of environmental pollution facility into the environmentally sensitive area like water supply source and to regulate land utilization as a method to achieve pollution prevention.
Second is a consideration of environmental technology development. It is required to newly consider whether the case of perfectly treating pollutants as environmental technology improve, may be deleted in the economic regulation list or not. This is a solution which can accomplish the development of environmental technology and the reinforcement of economic competition.
Third is the coexistence of environment and economy. It is necessary to consider economy in environmental problem and environment in economic problem. Then, we can enjoy healthy life as well as economic affluence.
Fourth is the enlargement of environmental management means. Environmental management means must be diversified because environmental cause and effect are varied.
Improving land use regulation system, it is necessary to consider both land use regulation status and pollutant toxicity with the development of environmental technology. Land use must be approached by classifying land to 3 levels; water source protection zone and water front zone, special zone 1 and 2, and other zone. Land regulation policy to prevent any accident in water source protection zone, waterfront zone, and special zone must be continuously upgraded. However, economical consideration in other zone is required by the development of environmental technology.