Jason Momoa Highlights Effects Of Climate Change On 'Small Islands' In United Nations Speech

Jason Momoa wrapped up 'Climate Week' at the UN's New York City headquarters on Friday local time, highlighting the dire fate of "small island nations" if the world fails to solve climate change.

The Aquaman star focused his six-minute address on the devastating effects of man-made ocean pollution on islands like his native Hawaii.

Momoa told the audience that oceans are in a "state of emergency" and island nations and all coastal communities are on the "frontlines" of the world's environmental crisis.

“Entire marine ecosystems are vanishing with the warming of the seas. And as the waste of the world empties into our waters, we face the devastating crisis of plastic pollution," Momoa said.

The 40-year-old described his stirring speech as "nothing sugar-coated, just straight from the heart" when he posted the video to Instagram.

Momoa challenged the world leaders in attendance to act immediately, insisting an ecological crisis is now upon us.

"Change cannot come in 2050, 2030 or even 2025 -- change must come today," he said.

The U.N. General Assembly, attended by 193 member states, held its 74th session this month in New York City. Momoa testified at a summit held to review a global effort addressing the challenges of small island states.

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During his speech, Momoa referenced the Great Pacific Garbage Patch -- two enormous masses of "ever-growing garbage" in the Pacific Ocean. He also said entire islands were drowning into the sea due to the enormous volume of carbon emissions generated by first-world countries.

"If you continue to watch unsympathetic to the issues of island nations this realisation will soon come that you stood by and witnessed the world across the critical tipping point, ushering the death of our planet," Momoa said.

The actor finished his address with the words “Ku Kia‘i Mauna!” in solidarity with those opposed to the construction of the $2 billion Thirty Metre Telescope on Mauna Kea, a dormant volcano in Hawaii.