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Urchins feed on algae and invertebrates-a recent study found that the sound of their teeth scraping on reefs can cause a rise in ocean noise.

海胆以海藻和无脊椎动物为食——一项近期的研究发现它们牙齿磨礁石发出的声音会增加海洋的噪音。

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Scientists are also worried that, as carbon dioxide emissions rise, the ocean will absorb greater amounts of the greenhouse gas, shifting the chemistry of seawater.

科学家们同时担心，随着二氧化碳排放量的增加，海洋将会吸收更多的温室气体，进而改变海水的化学性质。

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These include hearing a roaring or sucking noise, seeing the ocean suddenly pull back or rise, or feeling a strong earthquake that lasts more than twenty seconds.

VOA: special.2011.06.07

If the ocean continues to rise, before long the salt water will begin to seep through from under the walls.

ECONOMIST: Letter from Maldives

He obviously continues to worry a lot about Hansen's predicted catastrophic rise in ocean levels.

FORBES: Magazine Article

Excess carbon dioxide is accelerating global warming, sea level rise, ocean acidification and overall climate change.

CNN: An SOS on World Oceans Day: Save our seas, save ourselves