As of 2007, Secretary-General Ban Ki-moon continued the reform agenda covering oversight, integrity, and ethics which had previously been launched in response to investigation of the UN Oil-for-Food Programme. The Programme responded to the humanitarian needs of the Iraqi civilians and was the largest, most complex and most ambitious relief effort in the history of the United Nations. With reference to the 2005 World Summit, the General Assembly approved in April 2007 a number of loosely related reform initiatives, covering international environmental governance, a unified gender organization, and 'Delivering as One' at the country level to enhance the consolidation of UN programme activities.