Food

Food is one of the basic Game Concepts in Civilization VI, which contributes to what make cities grow.

Description

The icon is showing you that the citizens are decreasing because of lack of food.

The growing formula is that each of your Citizens in a given city uses 2 food. The remaining food produced is put towards the production of getting the next Citizen (you'll see the number on the left hand side next to the amount of Citizens in your City), so population increases with excess food.

A lack of food to your city will decrease your City's Citizens and Population.

There are two new mechanics related to population and food: Housing and Amenities.