Translate the following English sentence to French:
"Yet, the more time that passes, the more the (semi-) natural habitats are destroyed, and the more difficult it becomes to preserve or to re-establish the ecosystems in all their diversity and richness."
Or, plus le temps passe et plus les milieux (semi-)naturels sont détruits, plus il sera difficile de conserver ou de rétablir les écosystèmes dans leur diversité, leur richesse.