Buzullar küresel ısınma nedeniyle eriyor.
- Glaciers are melting because of global warming.
Buzullar, kara buzları ve buzul dağları tatlı sudan yapılmıştır.
- Glaciers, land ice and icebergs are made of fresh water.
... As the glaciers recede, ...
... By 50,000 years ago, glaciers begin to advance down from the North Pole. ...