Grandboy: Grandpa, we should all stop using trees. We need trees for OXYGEN

Me: Well, we need to use trees to build things. Stopping all use of trees isn’t practical.

Grandboy: Maybe scientists can come up with a way to make MORE TREES. Then we’d replace the ones we use.

Me (raising an eyebrow)

Grandboy: (thinking) oooooo that’s called PLANTING SEEDS, right, grandpa?

Me: Sometimes the simplest things are the best.