As world leaders meeting in Copenhagen struggle to come up with an agreement to tackle climate change, there is one man who's imperative to save the planet comes from a higher source.
Ecumenical Patriarch Bartholomew I of Constantinople is the spiritual leader of the world's 300 million Eastern orthodox christians, he preaches that any degradation of our environment is a sin.
Al Jazeera has been to meet the religious leader dubbed the "Green Patriarch".
