Desmond Tutu’s devotion to the planet and to justice for all | Letters

Readers commemorate the late South African archbishop, and the causes of peace, equality and environmentalism that he championed

Your informative obituary of Archbishop Desmond Tutu (26 December) missed an important dimension - his warnings on the need to save the planet. In March 2004, he delivered a lecture entitled God's Word and World Politics at the United Nations as part of Kofi Annan's public lecture series on cutting-edge topics in the humanities, natural sciences, social sciences and the arts.

The archbishop said: Ecological concerns are a deeply religious, spiritual matter. To pollute the environment, to be responsible for a disastrous warming, is not just wrong and should be a criminal offence; it is certainly morally wrong. It is a sin."
Prof Abiodun Williams
Tufts University