Employing Participatory Citizen Science Methods to Promote Age-Friendly Environments Worldwide.

The trajectory of aging is profoundly impacted by the physical and social environmental contexts in which we live. While "top-down" policy activities can have potentially wide impacts on such contexts, they often take time, resources, and political will, and therefore can be less accessible to underserved communities. This article describes a "bottom-up", resident-engaged method to advance local environmental and policy change, called that can complement policy-level strategies for improving the health, function, and well-being of older adults.