Pakistan to host World Environment Day today By Pakistan is hosting World Environment Day today. This year, the theme is "ecosystem restoration" and focuses on resetting our relationship with nature. Pakistan will highlight environmental issues and showcase the country's own initiatives and its role in global efforts. ISLAMABAD: In partnership with the United Nations Environment Programme, Pakistan is hosting World Environment Day on Saturday (today). The day will be celebrated across the world through various events and activities, in line with the latest coronavirus regulations. This year, the theme is "ecosystem restoration" and focuses on resetting our relationship with nature.