Sentence examples for became a serious problem from inspiring English sources

The phenomenon of space sharing became a serious problem citywide a decade ago, when small, alternative schools began cropping up in large numbers.

Unemployment became a serious problem, especially in those areas where major industries had declined.

Inflation, which averaged 15 percent or more annually, became a serious problem.

But how to separate solid talent from idle chatter became a serious problem.

Women deluged the stage with flowers, so many that disposal became a serious problem.

European settlement made such inroads on the natural forest that erosion in high-country areas became a serious problem.

Global warming has become a serious problem.

But it's become a serious problem.

Since then, unemployment duration becomes a serious problem.

An aging population has become a serious problem in China.

By the 1980s it had become a serious problem.