Each carbon credit and each project that generates such carbon credit have its own characters. Entities that plan to obtain carbon credits to satisfy their commitment to reduce greenhouse gas emissions need to build up their credit portfolios so as to minimize any negative impact that a certain change in regulatory or business environment may have on any part of the prospective to secure credits in future. Natsource asset management service supports such entities to optimize their carbon portfolios by assessing value and risk of their projects and credit purchase agreements.