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UPSC PRELIMS+MAINS Index A) Agriculture, Geography, Environment and Biodiversity Uttarakhand disaster and the Glacial Lake Outburst Floods (GLOF) (TH) B) Science and Technology, Defence, Space Arab world’s first probe nears Mars (TH) C) Schemes/Policies/Initiatives/Social Issues “Kiran” mental health rehabilitation helpline (TH) D) Economic Developments: India and World What is Non-Tax Revenue?…