In a first, Pakistan to host World Environment Day 2021 Pakistan Photo: File Pakistan, on June 5, will host World Environment Day 2021 in partnership with the UN Environment Programme (UNEP). Prime Minister Imran Khan will virtually preside over the World Environment Conference in Islamabad on the night of June 4. This will be the first time in history that the country will be officially hosting the day. Only four global personalities, including Prime Minister Imran Khan, have been selected to participate in the World Environment Conference this year. The conference will be attended by the Secretary-General of the United Nations António Guterres, Pope Francis, and the German Chancellor Angela Merkel.