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As seas warm and ice melts, Earth's oceans have risen steadily.

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Now scientists say sea level rise is accelerating, according to a new study based on NASA data.

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In the past 25 years, sea level is not only rising, but the rate of that rise is getting faster.

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Increased ice melting in Greenland and Antarctica is primarily responsible for the acceleration.

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If this acceleration continues, global sea level could be 26 inches higher by 2100.

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Understanding how fast sea level is increasing can help prepare for the effects in coastal areas around the world.