How does a yard replenish mass when grass is constantly being cut and discarded?

Question

How does a yard replenish mass when grass is constantly being cut and discarded?

In: 176

Answer 1

Plants are made mostly of Carbon, and while it will suck water and some trace nutrients from the ground, the vast majority of the plant is from Carbon.

Where does the Carbon come from? from the CO2, Carbon Dioxide, in the air. So the vast majority of the plants mass never came from the yard, but from the air.

Look at a tree, think about how much it weighs. That is roughly the amount of CO2 it needed to convert out of the atmosphere to grow that large.