Protecting nature is “fundamental to our survival” and should not be dismissed as “hippy”, the Duke of Sussex has said.
Writing in the Daily Telegraph, Prince Harry said humanity needs to beat “greed, apathy and selfishness” to guarantee its survival in the world.
He said it is essential to “co-exist”, and learn from mistakes “to protect the world's most valuable assets”.
It comes as he prepares to visit a conservation project in Malawi.
On his visit to the Liwonde National Park, the duke is expected to pay tribute to Matthew Talbot a British soldier killed by an elephant earlier this year while working as a counter-poaching operator.
Earlier, at a reception at the official residence of Britain's High Commissioner to Malawi, he said a major collaborative effort “across agencies, borders and continents” is needed to end the poaching of animals in Africa.
Prince Harry also held talks with Malawi's president Peter Mutharika.
The Duke and Duchess of Sussex are on a 10-day tour to southern Africa, their first official overseas trip with their four-month old son, Archie.
Meghan and Archie have remained in South Africa while the duke is currently on a solo tour that has also seen him go to Botswana and Angola.
On Sunday, Meghan, met female activists and leaders at an event in Cape Town, South Africa.