The Prince of Wales has described the challenge of protecting the world's oceans as "like none that we have ever faced before." In a speech delivered to the Blue Economy and Finance Forum in Monaco, Prince William said life on the ocean floor was "diminishing before our eyes" and called for ambitious action "on a global, national and local level".

At the Grimaldi Forum, named after Monaco's royal family, the Prince spoke in both English and French as he laid out what was at risk. "The truth is that healthy oceans are essential to all life on earth. They generate half of the world's oxygen, regulate our climate and provide food for more than three billion people," he said.

Rising temperatures, pollution and overfishing are causing huge damage to the world's oceans and the communities that rely on them. The forum comes ahead of the UN Ocean Conference in Nice, France, this week, with the events looking at the role oceans play in global trade, food security and sustainable energy.

In Monaco on Sunday, the Prince was speaking to an audience of environmentalists, scientists and investors – many of whom have travelled there with a view to financing ocean protection projects. Prince William acknowledged that investing in ocean work can be a tricky proposition for investors. "All too often, it can feel distant and disconnected from our everyday lives, allowing us to forget just how vital it is," he said. "We must realise the potential of the blue economy for our ecosystems, our economies and our communities."

The Prince was speaking as founder of the Earthshot Prize, which gives out five £1m prizes each year for the best solutions to the greatest climate challenges.

The forum was attended by the presidents of France, Brazil and Costa Rica, as well as Prince Albert II of Monaco.

Source: BBC