We know that, we can't live with
out good environmental situation. But the condition of the environmental
situation is getting worse day to day in our life. The awareness for improving
environmental situation has been starting in 1960, and held many international
conferences for conserve of environmental situation. But environmental
situation is not in improving condition. These conferences declared many
policies and strategies to improve environmental situation and invest much properties.
Human Environmental international conference made international level
government policy for conservation of biosphere in 1972 (Sweden).