The Archbishop of Canterbury gave a lecture at the Ebor Lecture, York Minster, to spell out why respect for the environment is not an optional extra, particularly for Christians. Dr Williams suggests that "we are capable of changing our situation"; in "Christian terms, this needs a radical change of heart, a conversion." The Ebor Lectures are a series of lectures which aim to relate faith to public concerns.
The full article can be found here: http://www.archbishopofcanterbury.org/2351