There are 18 Regional Seas Conventions and Action Plans, six of which are administered directly by UNEP: Mediterranean (Barcelona Convention), Wider Caribbean (WCR), East Asia Seas, Eastern Africa (Nairobi Convention), Northwest Pacific (NOWPAP), and West and Central Africa (WACAF). The RSCAPs are instrumental in supporting the implementation of the Global Programme of Action for the Protection of the Marine Environment from Land-based Activities (GPA) at regional levels. Several RSCAPs have developed or are in the process of developing regional action plans on marine litter (see Box 2.8, Figure 2.2).