Firm evidence or dubious ideology?

Pope Benedict XVI on global warming as reported by the Daily Mail:

Pope Benedict XVI has launched a surprise attack on climate change prophets of doom, warning them that any solutions to global warming must be based on firm evidence and not on dubious ideology.

and

The German-born Pontiff said that while some concerns may be valid it was vital that the international community based its policies on science rather than the dogma of the environmentalist movement.