Hedge-rows; access protection; assisted natural regeneration; Delfino trenches. Ha. 10,000. 20,000. 30,000. All regions. 1,200,000. 60,000. 4,200,000. 8,400,000. 12,600,000. 12 regions (CT) or 180 communes, in cooperation with grassroots communities, create and organise one biodiversity conservation area each with a commune or regional focus, at least 5,000 ha in area.