There have been times when man has ignored "God's teaching on creation," Pope Benedict said in response to a question on the environment.

But he rejected criticism that Christianity had encouraged the squandering of resources under the pretext of following the commandment to rule over the Earth.

The wastefulness was due to a "materialistic world" where "God is denied," Pope Benedict said.

"God entrusted man with the responsibility of creation" and "creation and redemption are closely bound together," he said.

Pope Benedict's comments came at a closed meeting of 400 priests from the north of Italy where he is spending his holiday. Reporters were briefed by the Vatican spokesman, Federico Lombardi.

Lombardi said Pope Benedict cited St Francis of Assisi as an example in urging Catholics to adopt "a way of life that is respectful of the environment."

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