Prince Harry has promised he will only have at most two children, saying any more would be irresponsible for the planet.
The young royal made the comment during an interview with world-famous primatologist Dr Jane Goodall for the September issue of Vogue magazine.
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As the pair discussed the ailing state of our planet, Prince Harry promised to have "two, maximum" after Dr Goodall, hinting at the environmental impact of overpopulation, implored him to have "not too many" kids.
"We are the one species on this planet that seems to think that this place belongs to us, and only us," Prince Harry told Dr Goodall. Humans were like a "frog in the water and it's already been brought to the boil," he added.
Prince Harry and his wife Meghan Markle, the Duchess of Sussex, gave birth to their first child Archie in May this year.
Talking about future generations, Dr Goodall told Prince Harry that we have "stolen their future" and we now need to "pay a little of it back".
We need to "get together to try and heal some of the harm, and at least slow down climate change," she said.
The pair also touched on the subject of unconscious racism during their chat, saying many people have internalised racists views without consciously knowing it.
"Just as stigma is handed down from generation to generation, your perspective on the world and on life and on people is something taught to you. It's learned from your family, learned from the older generation, or from advertising, from your environment," Prince Harry said.
Talking about unconscious bias, Prince Harry added, "Despite the fact that if you go up to someone and say, 'What you've just said, or the way that you've behaved, is racist', - they'll turn around and say, 'I'm not a racist'. 'I'm not saying that you're a racist, I'm just saying that your unconscious bias is proving that, because of the way you've been brought up, the environment you've been brought up in, suggests that you have this point of view - unconscious point of view - where naturally you will look at someone in a different way'. And that is the point at which people start to have to understand."
The interview between Prince Harry and Dr Goodall features in the September issue of British Vogue, which is guest-edited by Meghan Markle and entitled "Focus of Change".
Also featured in the issue is New Zealand Prime Minister Jacinda Ardern, who will appear as one of 15 women considered "incredible trailblazers working tirelessly behind the scenes to change the world for the better".