Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall Christmas Card Photograph 2020 Prince Charles and Camilla, Duchess of Cornwall | Credit: Clarence House "@ClarenceHouse's audience will be encouraged to follow the hashtag #POWNatureChallenge and share their creative responses throughout the week in the form of drawings, photographs or even short films. A gallery of highlights will be posted on the Clarence House pages the following week." Six of Prince Charles' patronages will help deliver the daily challenges via social media. Each organization involved will discuss and/or demonstrate ways in which it is helping to protect and nurture nature. Queen Elizabeth's eldest son and heir has been a strong advocate for conservation for decades. He gave his first speech regarding the topic of environmentalist back in 1968.