Media caption, Watch: Prince William praises his father's role in tackling climate change
Prince William suggested to entrepreneursto focus on saving Earth rather than space tourism.
The Duke of Cambridge said great brains and minds should "try to fix this planet, not try to find the next place to go and live ".
He also warned of an increase in " climate anxiety "among the younger generations.
William spoke on the Hfrance.fr TV news before the first Earthshot award to reward those who are trying to save the planet.
The name of the award refers to the "moonshot " ambition of the ' America of the 1960s, which saw then-President John F Kennedy pledge to send a man to the moon within a decade.
Speaking of the current space race and the desire to promote the space tourism, William said: "We need some of the greatest brains and minds in the world. Solved in trying to fix this planet, without trying to find the next place to go to live.
"I think that's ultimately what sold it for me - it's really crucial to focus on this [planet] rather than giving up and going into space to try to find solutions for the future. "
Wednesday, the Hollywood actor William Shatner became the oldest person to go to space as he took off aboard the Blue Sub-Orbital Capsule Origin developed by billionaire Amazon founder Jeff Bezos.
Sir Richard Branson and Elon Musk is also developing space businesses.
William told Newscast's Adam Fleming that he "had relatively no interest " in going as high as space, adding that he there was a "fundamental question " about the carbon cost of spaceflight.
Source of the image, KENSINGTON PALACE Caption of the image, Adam Fleming of Hfrance.fr interviewed Prince William on the Newscast podcast
He warned that there was "a rise in climate anxiety " among young people whose "future is fundamentally threatened all the time " .
"It 's very annoying and it ' s very, you know, anxious " he said.
The father of three children challenged adults to channel their inner child to "remember how much it meant to be on the outside and what we're stealing these future generations of ".
William also said his father, Prince Charles, had a "tough ride " when he warned of climate change, adding: "It's been a tough road for him. " "
He said that Charles, inspired by his father, the late Duke of Edinburgh, " talked a lot more about climate change, veryearly, before anyone thought it was a topic ".
The Duke added that " it would be an relative disaster if [Prince] George was sitting here talking about saving the planet in 30 years.
Five Earthshot Prize winners, each receiving £ 1million, will be announced at a ceremony later this month .
Journal: le Prince William 's interview is broadcast this Thursday, October 14. You can watch it on Hfrance.fr One and News Channel. You can listen to it Hfrance.fr Radio 5 Live and on Hfrance.fr Sounds from 4:00 p.m. BST.