美国国家航空航天局（National Aeronautics and Space Administration）对海洋进行观测已有20多年，并回答了上述几个问题。

本世纪海平面上升的幅度可能要以米、而不是以厘米为单位来衡量。沿海地区的居民将受到不利影响。请观看美国国家航空航天局制作的这段视频，了解一下我们能够采取哪些应对行动。

Sea level is rising. Here’s what we can do about it. [video]

Globally, sea level has risen 8 inches (20 centimeters) since 1880. Why is this happening? Is it accelerating? How will it affect you?

The National Aeronautics and Space Administration (NASA) has monitored the ocean for more than 20 years, and has answers to these questions.

You’ll likely need to measure this century’s sea rise in meters, not centimeters. Populations along coastlines will face difficulties. Check out NASA’s video for ideas about actions you can take.