UNCTAD , within its mandate and without duplicating the ongoing work of other organizations , should consider climate change in its ongoing work of assisting developing countries with trade‐ and investment‐related issues in development strategies . Single-year Expert Meeting on `` Trade and Climate Change : Trade and Investment Opportunities and Challenges under the Clean Development Mechanism , and associated reports ( The State of Play of the Clean Development Mechanism : Review of Barriers and Potential Ways Forward '' ( UNCTAD/DITC/BCC/2009/3 ) , Developing Country Interests in Climate Change Action and the Implications for a Post-2012 Climate Change Regime ( UNCTAD/DITC/BCC/2009/2 ) , and `` The Clean Development Mechanism - Guide 2009 '' ( CDM2009 ) .