These are referred to as positive or negative externalities. Second, externalities can be defined by how they are created. Most often, these are defined as a production or consumption externality.

Learn the definition of positive and negative externalities and which methods economists use to measure externalities in theory and in practice.

(If it’s a negative externality then your getting fat harms others, whereas if it’s a positive externality then your obesity benefits others.) ...

Positive Externality (Britannica) Externality: What It Means in Economics, With Positive and Negative Examples (Investopedia) Additional Resources. Bell Ringer: Government Approach to Externalities ; ...