New Delhi: Under Secretary General of United Nations and Executive Director of UN Environment, Erik Solheim and Ministry of Environment, Forest and Climate Change Secretary, C.K. Mishra sign a Letter of Intent on hosting of World Environment Day 2018, in the presence of the Union Science and Technology Minister Harsh Vardhan and Union MoS Culture and Environment, Forest and Climate Change, Mahesh Sharma in New Delhi on Feb 19, 2018. (Photo: IANS/PIB)