Maintainance of environmence issues in international rivers

Many issues are caused in any ways within international rivers. International rivers have many legal issues. The environmental issues are pollution, building of dam or water-storage, dumping of waste, a true line in a navigable river and so on. These impacts are not the same. Every State has the sovereign right to utilize its natural resources in accordance with its environmental policies. States have the sovereign rights to exploit their natural resources pursuant to their environmental policies and their duty to protect and preserve the environmental problems. State has the obligation to protect and preserve the environment. It is the responsibility of the State and every citizen to preserve its natural resources in the interests of present and future generations. The maintenance systems are not alike. Especially, it is based on geographical, meteorology, society, history, politics, and economics of each region. Legal measures for environmental problems in international rivers are regulatory standard, Conventions, report and rule. The concerning States should conclude treaties to cooperate. So, States are trying to have a universal treaty that will regulate all the international rivers allowed the world like the UN Charter