Biological and environmental studies may be necessary to obtain certificates of authorization, but they can serve also for habitat conservation projects, research on endangered species, field inventories to know the fauna and flora of a particular environment, protection of biodiversity, assessments of the ecological value of natural environments and more.

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• Ecological studies of water environments (wetlands, high water mark, shore, coast)

• Ecological studies of terrestrial environments (vegetation, type of habitat)

• Ecological studies with scientific protocol for research purposes

• Inventories of fauna and flora

• Studies of species at risk