The 34-year-old royal has admitted he's always making sure that his cottage home in Kensington Palace doesn't have too many lights on, and says he inherited the "small habit" from his environmentally conscious father Prince Charles.
Britain's Prince Charles said he will stop speaking out on issues he feels strongly about when he becomes king as he is "not that stupid".
In Accra, the Ghanaian capital, Prince Charles gave a speech about the threat of climate change and his concerns for the future, adding that he worries about his grandchildren and environmental issues such as plastic pollution.
Millions of viewers were left deeply moved as the prince turned to his father and said, "Thank you Pa", as Charles completed the walk down St George's Chapel at Windsor with Meghan on his arm.
Queen Elizabeth never comments on political matters, though what she says at her regular meetings with serving prime ministers is never reported or publicly disclosed.
"I'm not that stupid", he said.
Prince Harry and Prince William admit they are very much like their father. "Clearly, I won't be able to do the same things I've done, you know, as heir so of course you operate within the constitutional parameters", he said.
Heater malfunction mistaken for gunfire at high school
Topsail High School is located near the coast in Hampstead, about 20 miles (32 kilometers) north of Wilmington. Live footage shows numerous law enforcement agencies now at the school where the scene remains active.
Prince Charles turns 70 on Thursday November 14. I do realise that it is a separate exercise being sovereign. "I may have to take these back for the children".
"I find it hard to believe that almost thirty years have passed since I first came to this city and having finally made it back here, Ladies and Gentlemen, all I can say is that "God don butta my bread!"
Charles' wife, Camilla, Duchess of Cornwall, couldn't see what was said between son and his father at the altar, but says she watched it later on TV. "I think he does have time for it, but I would like him to have more time with the children", said William. "I think that was very touching", she revealed in the documentary. "I don't think people realize quite how kind he is".
The Duke of Cambridge has said he wants the Prince of Wales to spend more time with his grandchildren because "when he's there, he's brilliant".
She added: "He would like to save the world".