Complex sentence: Liguria's Natural Reserves cover 12% of the entire Region, i.e. around 60,000 hectares of land, and they are made up of one National Reserve, six large parks, two smaller parks and three nature reserves.
Split into simpler sentences: Liguria's Natural Reserves cover 12% of the entire region, or 60,000 hectares of land. They are made up of one National Reserve, six large parks, two smaller parks and three nature reserves.