Prince Charles has described feeling proud of his sons, Princes William and Harry, for their role in recognising the threat posed by climate change. The essay seems particularly surprising given how frosty relations have been between Prince Harry, his wife Meghan Markle, and the rest of the royal family in recent years.

The 73-year-old heir to the British throne wrote a lengthy essay for Newsweek, urging global leaders to come together and address the growing threat of climate change. In the essay, Charles mentions the work both of his sons have done to advocate for action on climate change, writing, “The scale and scope of the threat calls for regional and global solutions that will require the active participation of every sector of industry, in every country around the world. As a father, I am proud that my sons have recognised this threat.

“Most recently, my elder son, William, launched the prestigious Earthshot Prize to incentivise change and help repair our planet over the next ten years by identifying and investing in the technologies that can make a difference.

“And my younger son, Harry, has passionately highlighted the impact of climate change, especially in relation to Africa, and committed his charity to being net zero.”

Charles continued, “The time is now. The eyes of our children and grandchildren are judging us. Let ours be the generation that can. And does. As we enter a new year, there is not a moment to lose.”

Recent reports have suggested that Harry, his brother and his father have “barely spoken” in recent months, following Harry and Meghan’s resignation from royal duties and move to California in early 2020.

In an interview with Oprah, the couple described feeling hurt by comments made about their son Archie before his birth, speculating as to what his skin tone would be. It was alleged in a recent book that Charles was the family member who made those comments, with Harry revealing that their relationship was strained.

Image: Samir Hussein/WireImage

This article first appeared on OverSixty.