This moral challenge often comes hardest to those who think of themselves as environmentalists in particular.

That could not be part of Buddallah's plan, but the moral challenge was.

There is a fundamental moral challenge for the church, and for society.

"This is the practical and moral challenge of our time."

In fact, like the Holocaust, it is a moral challenge to the world, one we are failing.

"He put a moral and political challenge on Congress."

But putting the ruling into practice will pose legal and moral challenges.

The moral challenge and philosophical depth of African literature are upon us.

And he sees our collective response to it as a moral challenge.

Today, we have to answer the same moral challenge.