Wind-pollinated plants release enormous quantities of pollen. Which explanation of that quantity is correct?

Erklärung

Air carries grains in every direction with no aim whatever, so the chance that any one grain settles on a suitable receiving surface is tiny, and the plant compensates by releasing far more than it could ever need. Equating grains with seeds confuses the delivery vehicle with the result, since a grain contributes to a seed only if it happens to arrive and fertilisation then follows.