FILE PHOTO: Britain’s Prince William, Duke of Cambridge interviews naturalist Sir David Attenborough during the World Economic Forum (WEF) annual meeting in Davos, Switzerland, January 22, 2019. REUTERS/Arnd Wiegmann/File Photo

LONDON (Reuters) – Britain’s Prince Charles and his two sons William and Harry were due to attend the world premiere of the Netflix television series “Our Planet” on Thursday to underline the royal family’s support for action against climate change.

British naturalist David Attenborough, 92, who narrates the series, was hosting the event at London’s Natural History Museum.

Charles made his first speech on the environment in 1968 and has long warned of the dangers of climate change. He has been president of the WWF UK conservation organization since 2011.

“There has never been a time