This document discusses the concept of utility fog, a hypothetical future nanotechnology. It begins by defining nanotechnology as materials and devices that are one-billionth of a meter in scale. It then introduces utility fog as a potential application of nanotechnology that could make things lighter, stronger, and more efficient. The document outlines several impacts to consider of utility fog, such as health effects, environmental impacts, issues of governance, and implications for power, rights, responsibilities, equity, and values.