As a sustainability manager, I want to be able to view my emission groups in a hierarchical format, so that I can see the different activities and emissions sources within each group and understand their relationships. This will help me to better understand the sources of our company's emissions and identify opportunities for reducing emissions.

To implement this, you could add a new feature to the My Data table that allows the user to expand and collapse the different emission groups to view their contents. The hierarchical format could be represented using indentation or different levels of grouping (e.g. using different colors or symbols for each level of the hierarchy).

This feature would allow the sustainability manager to quickly and easily view the different emission groups and their contents, and would provide a more intuitive and comprehensive view of the company's emissions. It would also make it easier for the sustainability manager to identify areas where emissions can be reduced and to track the progress of their efforts to reduce emissions.