The Art and Craft of International Environmental Law - Paperbackby Daniel Bodansky (Author), Harro Van Asselt (Author) In countless ways we are affected by international environmental norms: some social, others legal; some quite general, others very specific. For example, the norms limiting the refrigerants used in air conditioners have been agreed upon in legal form internationally, and are mandated and enforced by national governments. The sustainable fishery and forestry standards used by Carrefour and Ikea