alarm

1 - Adults and children are frequently confronted with statements about the alarming rate of loss of tropical rainforests.

2 - Despite broad consensus on the existence, origins and potentially catastrophic effects of global warming, a vocal minority continues to question the motives, methods and assumptions of climate scientists sounding the alarm.

3 - Human cases of bird flu are incredibly alarming, and raised the concern of virologists and government agencies in China, Hong Kong, Vietnam, Canada, and other countries.

4 - People who can reliably wake up at a time they select may be depending on a hormone boost as their internal alarm clock.

5 - A study published in a scientific magazine has raised the alarm worldwide that the very existence of the polar bear is in jeopardy due to the fact that the ice is melting in Arctic Sea as a result of global warming.