As a realm of scientific investigation called ecology, it has assumed urgent importance in the maintenance of the human habitat. (scientificamerican.com)
In this excerpt from his Nobel Peace Prize acceptance speech, Elie Wiesel reminds the audience of the «urgent importance of the H... (achievethecore.org)
But there is another reason, which makes this textbook by Dr. Baglow of especially urgent importance. (firstthings.com)