Britain is one of the most nature-depleted places on Earth. The consequences for human wellbeing and resilience, as well as for non-human life, are grave. Conservationists and others say it doesn’t have to be this way. But when it comes to recovery, what should we aim for? How much can we know about what was once present? How much is it practicable or sensible to restore? What does recovery, let alone ‘rewilding’, really mean in a rapidly heating world? Sophie Yeo does not have the answers to all of these questions.