Share Thirteen national parks have been planned for Denmark. The Danish government proposes that park management should be based on rewilding, a strategy that includes the reintroduction of key grazing animals such as bison, elk and red deer in large natural areas that will manage themselves. The concept has become a heated topic of debate. One of the arguments against rewilding is that its economic costs will be high. But that argument does not always hold up, according to the first major economic analysis in this area. The analysis, led by the University of Copenhagen, compares the cost of rewilding in large contiguous natural areas with today’s most common type of nature conservation: extensive farming, with cows or sheep grazing on grassland. This type of conservation does not seem to have been able to halt biodiversity loss , which continues to shrink. On the other hand, numerous studies suggest that rewilding is a biologically more efficient method of management.