Letter to the United Nations Secretary General by Dr S Faizi, an ecologist based in Thiruvananthapuram, currently Consultant (Biodiversity), United Nations Development Programme (UNDP); Chair, International Union for Conservation of Nature/ Commission on Environmental, Economic and Social Policy (IUCN/CEESP) Task Force on Post-2020 Global Biodiversity Framework; Team Leader, Japan International Cooperation Agency’s (JICA's) Gujarat Ecosystem…