[Tax-chick]

There is that. And it’s making the grass grow.

[sionnsar]

Or the moss. And then you have to go mow it.

[NicknamedBob]

Besides rain, that grass is struggling to grasp every molecule of Carbon Dioxide it can get to produce cellulose for its structural material. (n CO₂ + n H₂O = C₆H₁₀O₅(n) {generic formula for cellulose} + O₂)

-- Gasping for breath, you might say.

We should feed it more. Smell the flowers, but breathe on the grass. (It will return the favor.)