In what unit are greenhouse gas measurements commonly reported?

Greenhouse gas measurements are commonly reported in metric tonnes because this unit is particularly suited for expressing large quantities of gas emissions. The metric tonne, equivalent to 1,000 kilograms, provides a clear and standardized measurement that facilitates comparison between different countries, industries, and regulatory frameworks. This consistency is essential when assessing environmental impacts, tracking progress towards emission reduction targets, and reporting data to international bodies such as the United Nations Framework Convention on Climate Change (UNFCCC).

Using metric tonnes also simplifies the aggregation of data across various emissions sources, allowing for easier interpretation and analysis. While other units like kilograms and pounds are still used in certain contexts, they are less effective for reporting large-scale emissions, as they may not convey the extensive impact in a manner that supports policy and decision-making at an international level.