The several causes of skyglow mainly differ in source.

The various conflicts of the New Zealand wars span a considerable period, and the causes and outcomes differ widely.

Formal cause, whereby a thing's form determines the thing's nature or role, as a human differs from a statue of a human.

Symptoms may vary greatly from case to case, partly because the genetic cause may differ between families.

The study showed that as expected, the causes of death for homeless people differ from those of the wider population, where disease is the biggest killer.

The most dominant cause of wildfires differs around the globe.

The intensity of the sky varies greatly over the day and the primary cause differs as well.

The cause may differ, as well.

The cause of loss of erectile function differs between surgery and radiation therapy.

But at different life stages, the causes and cures may differ.