What does Primary challenges mean for school?

High enrolments, inadequate government funding, inadequate physical facilities, inadequate teaching and learning resource materials, poor teaching, overcrowded classes, poorly constructed classrooms, heavy workload for teachers due to understaffing, uncooperative parents, student indiscipline and poor financial ...

Iwould say overuse ( but not 100% sure ) in the u.s. we tend to overuse water by leaving it running, throwing it away, taking long showers, etc.

Of the cold they can survive in the cold