The European debt crisis continues to hammer global stocks as fears grow that Europe's problems could have a wider impact.

VOA: standard.2010.05.21

The beginning of the problems with CO2 and global warming.

二氧化碳和全球变暖的问题2,也从此产生。

麻省理工公开课 - 热力学与动力学课程节选

This is the first global conference that aims to tackle the problems that result from climate change and devise strategies to help nations adapt to these changes.

VOA: standard.2009.08.31