Dalmatian90
Addicted to ArboristSite
The author used tomatoes as a simple analogy. It was said that tomatoes continue to be grown because people buy and use them. If people cease to buy tomatoes then farmers won't continue to grow them.
That's not really a strong argument.
If people never used another tree, Vermont would still mostly be trees. That's what's natural up there.
It's not like the North Woods of Maine would evolve into a giant blueberry barren or be leveled for housing if the pulp mills shutdown. The exact mix of species and ages of trees would change, but it would still be mostly a spruce-birch forest. That's what's natural there, and the land and demand isn't suited for agriculture or intense development. Now there is a good argument that by keeping those forests as working lands, we preserve public access as a side-benefit to large, undeveloped areas that might otherwise be sub-divided into a checkerboard of thousands of hundred-acre vacation properties that get no trespassing signs thrown up around them...but that is different from saying it's necessary to save the trees.
But you're not going to see wild tomatoes taking over south Florida left to their own devices; they only exist in large numbers because of the economic incentives to keep them around and spray them with pesticides and employ gangs of near-slaves to keep them cultivated. Likewise corn is only the dominant crop it is because of massive subsidies and markets created to use it.