There are also some sheep and dairy farms. They produce beef, milk and lamb and are a source of weanlings for finishing on other farms. The Hen Harrier SPAs have similar landscapes. The farmland is dominated by peatland (bog and heath) and wet (rushy) grassland. The low intensity farming carried out in these areas supports High Nature Value (HNV) farmland. These are high input, low output farms that produce high levels of biodiversity and other ecosystem services such as clean water, and high quality air and soil. These HNV farming systems exist because of the people who farm the land and so they very important for retaining vibrant rural communities.
Extensive farming systems provide environmental public goods and ecosystem services. These include Biodiversity, Carbon Sequestration and Storage, Landscape and Water regulation. Environmental Public Goods (EPGs) can be described as non-excludable i.e. if the good is available to one person, others cannot be excluded from the benefits it confers and non-rival i.e. if the good is consumed by one person it does not reduce the amount available to others.