This paper argues that to address greenhouse gas (GHG) measurement and management, and the broader climate mitigation challenge, there is a pressing need for public access to additional types of mitigation-relevant information. It is argued that any shift in policy focus at the international level from binding emission caps at the national level is likely to influence the development of international, national, and corporate mechanisms, including methodologies for monitoring and reduction of GHG emissions. These changes will further depend on a larger set of data to direct specific mitigation activities, beyond simple GHG emission data. Additionally, the author asserts that if the future climate regime calls for higher conformity in relation to technology standards or efficiency standards, as opposed to total emission targets, then the new reporting systems would need totally different types of data sets. The paper emphasises the need to have access to updated information beyond emission data, such as data on investment flows and technology market shares. This information access is essential in order to complement the existing quantitative information on greenhouse gas emissions from countries, sectors, products, and companies. Specifically, it is argued that there is a need for suitable indicators regarding investment in climate-friendly and energy infrastructure to support decision-makers in anticipating and detecting economic and political trends of relevance. While the use of fragmented, existing information for this purpose is useful and desirable, appropriate coordination at the global level with funding support and clear demarcation of responsibilities is likely to be a critical success factor.