The city of Stockholm has an interesting way of dealing with the thousands of rabbits killed every year to protect trees and shrubbery in the city’s parks. The bunnies are transported to a special heating plant, where the bodies are burned as a form of bioenergy. Last year Stockholm burned over 6,000 bunny briquettes. As to be expected many animal rights activists say they would rather go cold. "Those who support the culling of rabbits surely think it's good to use the bodies for a good cause. But it feels like they're trying to turn the animals into an industry rather than look at the main problem," said Anna Johannesson of Vilda kaniners ("Society for the Protection of Wild Rabbits").