In his memoir "Spare," Prince Harry reveals that his father is extremely passionate about the cause and has even sacrificed sleep to work on it.
Prince Harry writes that his father has always been a hard worker and believes that everyone should work. However, his work on climate change is like a religion to him, as he is fervently dedicated to saving the planet.
Despite facing ridicule from the press for his efforts, King Charles has been fighting for decades to raise awareness about climate change.
Late at night, Prince Harry and his brother Prince William would often find their father working at his desk surrounded by piles of letters and documents.
Sometimes they would even find him asleep with a piece of paper stuck to his forehead, and they would have to wake him up to continue his important work.