Environmental costs are particularly striking in the Netherlands. A large proportion of these costs consist of manure-disposal costs (approx. 8%). The costs on a closed farm with 500 sows and an average of 4,000 fattening pigs at any one time are calculated at €90,000 per annum, which is more than the family income achieved.
http://enews.nieuwskiosk.nl/jump.aspx?i=361&e=12766&u=1143163&li=142398&url=http://www.lei.wur.nl/UK/newsagenda/news/Pigfarming_sector_has_efficient_production_but_manure_results_in_high_costs.htm