World leaders will meet at the UN in New York later for more talks to save the world's oceans from overexploitation.

The UN High Seas Treaty has been through 10 years of negotiations but has yet to be signed.

If agreed, it would put 30% of the world's oceans into conservation areas by 2030.

Campaigners hope it will protect marine life from overfishing and other human activities.

Two-thirds of the world's oceans are currently considered international waters, which mean all countries have a right to fish, ship and do research there. But only 1.2% of these high seas, as they are referred to, are protected.

Catastrophic climate change outcomes, including human extinction, are not being taken seriously enough by scientists, a new study says.

The authors say that the consequences of more extreme warming - still on the cards if no action is taken - are "dangerously underexplored".

They argue that the world needs to start preparing for the possibility of what they term the "climate endgame".

They want UN scientists to investigate the risk of catastrophic change. According to this new analysis, the closest attempts to directly understand or address how climate change could lead to global catastrophe have come from popular science books such as The Uninhabitable Earth and not from mainstream science research.

Kenya's Wildlife and Tourism ministry says that climate change is now a bigger threat to elephant conservation than poaching.

In the past year, the country has recorded 179 elephant deaths due to the ongoing drought affecting the Horn of Africa.

Following consecutive seasons of poor rains, rivers and water pans have dried up and grasslands have shrivelled in the game reserves.

Australia has suffered a litany of natural disasters in recent years including historic bushfires

Australia's environment is in a shocking state and faces further decline from amplifying threats, according to an anticipated report.

The survey of Australia's ecological systems - conducted every five years - found widespread abrupt changes.

These can be blamed on climate change, habitat loss, invasive species, pollution and mining, it said.

The threats are not being adequately managed - meaning they are on track to cause more problems.

The illegal ivory trade threatening Africa's elephants

Nairobi's elephant orphanage cares for babies of mothers killed by poachers.

Despite a 23-year ban on international trade in ivory, elephants continue to be shot for their prized tusks, with much of the material ending up on sale in China. The very future of the African elephant, the largest land animal on Earth, could be at risk. Last year saw the highest number of large seizures of illegal ivory for more than two decades. From Kenya to Zambia, African law-enforcement and conservation authorities are facing a continuing battle with the poachers. And it is in the Democratic Republic of Congo, where governance is at its weakest, that the elephant population is being hit hardest, with thousands of elephants killed each year. Conservationists have recorded steep declines in population and fear fewer than 20,000 of the region's forest elephants remain in the Congo basin.