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Convention on Environmental Impact Assessment in a Transboundary Context (Espoo Convention)
The Convention on Environmental Impact Assessment in a Transboundary Context was adopted on 25 February 1991 by the United Nations Economic Commission for Europe and entered into force on 10 September 1997. The added value of this Convention is the setting of obligations of the Parties to carry out an environmental impact assessment of certain activities at an early stage of planning. It also lays down the general obligation of States to notify and consult each other on all major projects under consideration that are likely to have a significant adverse environmental impact across boundaries. Since 2014, the Treaty is open to ratification by all states of the international society. The Convention is complemented by the Protocol on Strategic Environmental Assessment.