 
 <prompt> E dey important make dis glacial bodies no melt because of heat? <response>: ```Glacial bodies wey pass 50,000 km2 (19,000 sq mi) dem dey call ice sheets or continental glaciers. Dem dey several kilometers deep, dem dey cover the ground wey dey under. Na only nunataks dey show for their surfaces. The only ice sheets wey dey exist now na the two wey cover most of Antarctica and Greenland. Dem get plenty fresh water wey if dem melt, global sea levels go rise by over 70 m (230 ft). Parts of an ice sheet or cap wey extend enter water dem dey call ice shelves; dem dey thin with small slopes and slow speeds. Narrow, fast-moving sections of an ice sheet dem dey call ice streams. For Antarctica, many ice streams dey drain enter big ice shelves. Some dey drain directly enter the sea, sometimes with an ice tongue, like Mertz Glacier.``` 