Name of those that define environmental information dissemination, and in what year?

The most widely recognized framework that defines and governs environmental information dissemination is the Aarhus Convention, formally known as the Convention on Access to Information, Public Participation in Decision-making and Access to Justice in Environmental Matters.

It was adopted on June 25, 1998, in Aarhus, Denmark, by the United Nations Economic Commission for Europe (UNECE). While not a single individual, the Convention represents the collective agreement of its signatory parties to establish rights for citizens regarding environmental information.