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In page Geography of Norway:

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Only 3.5% of Norway's land is considered arable land.[1] 0% of it used for permanent crops and permanent pastures.[citation needed] A 1993 estimate assessed Norway's irrigated land at about 970 km2 (370 sq mi).[citation needed] 38% of land area is covered by forests; 21% by conifer forest, and 17% by deciduous forest.[2] The remaining land is made of mountains and heaths (46%), bogs and wetlands (6.3%), lakes and rivers (5.3%), and urban areas (1.1%).[3] Over time, wilderness areas have decreased due to human intervention. In 2008, Environment Norway (Miljøstatus) referred changing land use as one of the most important factors for endangered species and declining biodiversity.[4]