UN Climate Change, in collaboration with United Nations Volunteers (UNV), is conducting an ambitious and innovative campaign to mobilize over 650 volunteers to assist in the delivery of this year’s conference. The call for volunteers has attracted a flood of interest. Since registration opened on Monday 18 September, over 6,000 applications have been submitted. This is the first time that volunteerism has been integrated into the planning and delivery of UN climate conferences on such a large scale.