LONDON — Months after Prince Harry and Meghan, Duchess of Sussex, welcomed their newborn son, the prince, one of the most prominent young fathers in Britain, again had some baby news.

It’s not what you might expect.

In an interview published this week, he made it clear that he and his wife plan to have no more than two children, a decision that he appeared to link to a greater consideration for the planet.

“Two maximum!” he said in a conversation with Jane Goodall, the famed British primatologist, that appeared online on Tuesday and will be published in British Vogue’s September issue.

“We are the one species on this planet that seems to think that this place belongs to us, and only us,” Prince Harry said, reflecting on humans’ impact on the Earth.