Assessment of key policies and measures to address the drivers of deforestation and forest degradation in Sri Lanka- Final technical report of a consultancy awarded to the Colombo Science and Technology Cell, Faculty of Science, University of Colombo, by United Nations Development Programme (UNDP) for the Sri Lanka UN-REDD Programme [2015; with S. Fernando, A. Senaratna, N. Pallewatta, N., L. Manawadu, U. Imbulana , I. De Silva,, and  S. Ranwala ]

Report on Technology Needs Assesment and Technology Action Plans for Climate Change Mitigation published by Climate Change Secretariat, Ministry of Environment and Renewable Energy Sri Lanka [2014]

Proceedings of the 5th APN South Asia Sub-Regional Cooperation Meeting & South Asia Proposal Development Training Workshop (Report prepared for the Ministry of Environment and Renewable Energy of Sri Lanka and APN) [2014]

Report on the barrier analysis and enabling framework for transport sector of Sri Lanka (Report submitted to the Ministry of Environment and Renewable Energy of Sri Lanka under climate change technology needs assessment for greenhouse gas mitigation) [2012]

Project ideas for transport sector of Sri Lanka (Report submitted to the Ministry of Environment and Renewable Energy of Sri Lanka under climate change technology needs assessment for greenhouse gas mitigation) [2012]

National Greenhouse gas Inventory Report for the Agriculture and  Land Use, Land Use Change & Forestry sectors, for the Second National Communication by the Government of Sri Lanka, submitted to the UNFCCC Secretariat [2011].

Estimation and analysis of greenhouse gas emissions from Agriculture, Forestry and Other Land Use (AFOLU) sector for the national greenhouse gas inventory of Sri Lanka (Prepared for the Ministry of Environment and Natural Resources, Sri Lanka, under the UNDP/TOKTEN program) [2008].

Global Program of Action (GPA) Test Regional Report of the South Asian Seas Region- Report submitted to the SACEP, and Prepared under the contract from UNEP/ GPA Coordination Office, the Hague, the Netherlands [2000]

Cost-benefit analysis of the of the proposed sewer network at Moratuwa/Ratmalana in Sri Lanka as a measure to protect coastal areas from land-based sources of pollution- Report submitted to the SACEP [2000; with B.M.S. Batagoda and B.M.N.K. Dorabawila]

Capacity building needs of Sri Lanka for the implementation of the UNFCCC

-Report written for the Ministry and submitted to the UNFCCC Secretariat [2000]. (published by the UNFCCC secretariat under Capacity Building).

Ten Years of Environmental Cooperation between Sri Lanka and Norway 1989-1999 (with S. Rahubadda).  NORAD Environmental Cooperation Programme, Ministry of Environment, Sri Lanka [1999].