In a speech, the 40-year-old detailed the effect of global warming on the Earth's oceans. Jason Momoa, via United Nations The former 'Game of Thrones' star added that humans are "the disease" wrecking the planet with pollution. Jason Momoa, via United Nations Momoa, who is from Hawaii, says island nations are not contributing to the issue as much as others. He explained that those areas can still bear consequences. The actor's speech at the United Nations comes soon after he participated in recent protests in his home state. The conflicts revolve around the dormant volcano Mauna Kea and the building of a new telescope.