From Richard Jefferys, Berkhamsted, Hertfordshire, UK
It is suggested that rewilding with large herbivores could sequester a lot of carbon in soil. But does this work long-term? I worry that soil contains a host of bacteria that love to degrade carbon to carbon dioxide. And ruminant herbivores, among the rewilding animals suggested, emit a lot of methane. (29 March, p 39)
