The knowledge and customary practices of indigenous peoples and local communities also enhance people’s quality of life by fostering cultural heritage and identity. In Europe and Central Asia, which has an area of 31 million square kilometres, the regulation of freshwater quality has a median value of $1,965 per hectare per year. Other important regulating services include habitat maintenance ($765 per hectare per year); the regulation of climate ($464 per hectare per year); and the regulation of air quality ($289 per hectare per year). Nature’s contributions to people are under threat due to the continuing loss of biodiversity. Sustaining nature’s contributions to people requires the maintenance of high levels of biodiversity. The continuing decline in biodiversity has had negative consequences for the delivery of many ecosystem services over the last decades. These include habitat maintenance, pollination, regulation of freshwater quantity and quality, soil formation and regulation of floods. These declines have occurred in part because of the intensive agriculture and forestry practices used to increase the provision of food and biomass-based fuels. Se rapport under "relevante dokumenter".