David Attenborough has made some brutal predictions about the future of our planet, during a sit-down chat with Prince William at the World Economic Forum in Davos, Switzerland.
The annual forum sees thousands of political, business and culture leaders coming together in the Swiss Alpine town to shape the future of the world.
The Duke of Cambridge and Mr Attenborough talked about the devastating effect climate change has had on the world's ecosystems and natural resources.
Mr Attenborough said it was it was "difficult to overstate" the urgency of the environmental crisis.
"We can wreck it with ease, we can wreck it without even noticing," he said.
"We're now so numerous, so powerful, so all-pervasive, the mechanisms we have for destruction are so wholesale and so frightening, that we can actually exterminate whole ecosystems without even noticing it.
"We have to now be really aware of the dangers of what we're doing, and we already know that of course the plastic problem in the seas is wreaking appalling damage upon marine life, the extent of which we don't yet fully know."
Mr Attenborough said the huge advancements in modern technology were doing irreversible damage to our natural resources.
"We can go everywhere, we can go into the bottom of the sea, we can go into space, we can use drones, we can use helicopters, we can use macroworlds, we can speed things up, we can slow things down, we can film in the darkness - and so the natural world has never been exposed to this degree before," he said.
"If we don't recognise the kind of connections I've been describing, then the whole planet comes in hazard, and we are destroying the natural world and with it ourselves."
Prince William said it was up to the current generations to reverse some of the devastating effects of climate change.
"Work to save the planet is probably going to largely happen on our watch," he said.
WATCH BELOW: Prince William's powerful speech on mental health