Yesterday’s walk took me past a couple of ponds. One of them sports a new fountain, a spray of water that gives the old farm pond an aura of glamour and glitz.

But the explanation is far more humble. It’s to aerate the lagoon, to make it healthy, to remove the green slime that fouls the waters of the murky pond next door.

Airflow is not only healthy for humans; it’s good for water, too. So even though I preferred the pond in its still state, I’m glad to see it’s looking clear and scum-free.

Bubbles matter. Flow matters. For ponds and for people, too.