| 1 | The deforestation of this country caused ecological imbalance. | |
| 2 | Lack of sleep can cause irritation, depression, and mental disorders. | |
| 3 | The current trade deficit indicates a serious imbalance between our import and export trade. | |
| 4 | SAD is a legitimate mood disorder and should be treated accordingly. | |
| 5 | The findings eventually could have implications for the treatment of humans with eating disorders, he said. |