[00:00.300]During big spring tides, seawater simply bubbles up through the ground.
[00:04.904]In 2006, the islanders experienced their highest tides ever.
[00:10.546]These islands could soon become uninhabitable.
[00:14.353]The seawater is poisoning the soil and groundwater.
[00:17.475]Eventually, the islands may have to be evacuated.
[00:20.041]This would be an unprecedented move, an entire nation relocated.
[00:24.661]So the ocean is threatening its islands, thanks to global warming.
[00:29.219]And yet, the Pacific is playing a massive part in slowing down climate change.
[00:35.537]The world's oceans have absorbed about half of all the carbon dioxide released so far into the atmosphere by industry,
[00:42.537] significantly reducing the greenhouse effect.
[00:46.481]But there's a catch.
[00:48.483]For the fish, all that extra carbon dioxide in the water can have some，unwanted side effects.
[00:53.776]All life in the Pacific is dependent on the tiniest of creatures, the plankton that floats freely in the currents.
[01:01.523]One of the most plentiful is the sea butterfly, a tiny marine snail, which uses its enlarged foot to fly through，the water.