Marine areas under national or international jurisdiction are subject to a progressive increase in industrial (mining, wind power), traditional (fishing), transport and recreational activities. And as they are also impacted by climate change and land-based pollution, the state of the environment and ecosystems is often degraded. In this context, there is an urgent need to strengthen the assessment of current and foreseeable impacts in relation to development policies, i.e., to assess their cumulative effects, reduce them as much as possible and compensate for residual impacts on the marine environment. In this context, IUCN adopted a motion, at the World Conservation Congress held on 3 to 11 September 2021, supporting the implementation of Marine Spatial Planning as a means of long-term conservation of marine and coastal ecosystems. The motion, which “urges the States to adopt a forward-looking approach to planning their maritime areas, which guarantees the preservation and long-term protection of marine and coastal ecosystems and the maintenance or restoration of their natural connectivity”, can be consulted here.