1. General data on the French coastline

The coastline, the contact zone between land and sea, brings together a wide variety of coveted environments. Estuarine zones, sandy or rocky coasts, wetlands and maritime marshes often offer economic benefits in addition to their ecological appeal.

It's undeniable, therefore, that the great variability of the coastline constitutes its richness. On these ever-changing shores, it's very difficult to distinguish between "natural" and artificial environments.