In the interview, which covered a range of subjects, Prince William also said they do not allow their children to have phones.
“It’s really hard. Our children don’t have phones, I think when George moves onto secondary school then maybe he might have a phone that has limited access,” he said.
“It’s getting to the point where it’s becoming a little bit of a tense issue but I think [Prince George] understands why, we communicate why we don’t think it’s right, and again I think it’s the internet access we have a problem with.
“I think children can access too much stuff they don’t need to see online,” he said.
He added that either he or Catherine do the school run most days and jokingly referred to himself as a taxi driver when conversing with Huck.
Speaking about the Earthshot Prize, being held in Brazil for the first time this year, Prince William said: “We’re halfway through the ten years that we’ve identified as the decade of change, where if we want to leave a lasting legacy and really change the way we protect and restore and live on the planet we have to do it in this decade of change.
“So am I pleased with the progress the Earthshot has made and where the world is headed in environmental and climate leadership? Yes, I think we’ve made progress. Is there a lot more to do? Yes.”
Winners of this year’s prize included a project to restore tropical forests and a global ocean treaty initiative.
Following the trip to Rio, officials announced they would be making Prince William an honorary citizen of the city, known as a carioca.
