CNN Chief International Security Correspondent Nick Paton Walsh takes an inside look at the fatal conflict playing out between elephants and mankind in Sri Lanka. 

In Sri Lanka, it's an all-out war between man and the Asian elephant. As the human population surges and their territories expand, the habitats for elephants are rapidly shrinking, leading to daily confrontations between the people who are trying to protect their homes, and the elephants who are losing theirs. Paton Walsh embeds with locals on overnight patrols who risk their lives to protect their crops from being trampled and villages from being charged by elephants during the night.

"This is not just a story about us taking away the spaces and greenery elephants have existed upon for centuries: be in no doubt, we are forcing them into tinier spaces so we can have more and more for ourselves, all the time, in the name of growth. It is a story about every fight for space happening on the planet now," said Paton Walsh. "Wars, migration, land disputes – they are all a symptom of our species' ravenous need to expand. In Sri Lanka, it is visually writ large. Elephants and people do not naturally interact, but here they scrap over a pumpkin. This conflict, which kills hundreds on both sides every year, is just a very vivid way of seeing the impact of our greed on the natural world that sustains us."

There are about 6,000 elephants in Sri Lanka and in 2023 humans killed 476 of them; elephants killed 169 people. As both elephants and people continue to die at an alarming rate, this violent struggle may be an ominous sign of what's in store for other wildlife across the globe impacted by climate change and human expansion.

CNN Senior International Correspondent Ivan Watson takes a sweeping look at the numerous natural disasters plaguing Australia, and how its changing climate could be a cautionary tale for countries across the globe.  

On Watson's journey off the coast of Australia, he learns about the death and destruction being caused by human activity both on land and under the water. Apocalyptic forest fires, storms and floods exacerbated by climate change at an unprecedented scale are threatening communities and Australia's most iconic species. In the Great Barrier Reef, a global record-breaking marine heat wave is causing the temperature of the water to rise, resulting in coral bleaching and dying. Watson speaks with the people trying to reverse the damage and prepare for the future.

"Australia is a country- a continent- on the front lines of climate change, with entire communities and eco-systems threatened by increasingly unpredictable natural disasters," says Watson. "On this journey, I was so lucky to see amazing natural treasures worth fighting to protect and save."

In this episode, Watson traverses the rugged and remote Kangaroo Island, scubas in the Great Barrier Reef, explores the protected oasis of Lady Elliott Island and more of Australia's diverse panorama.