Climate change often means less rainfall. Less rainfall often means crop failure. And that is when people starve. This was the warning given by Archbishop Zacchaeus Okoth, chairman of the Kenya bishops’ conference’s Justice and Peace commission, as world leaders gathered to discuss how to protect the environment from further vandalism by humanity. In other words, action to reverse the present direction of travel – 2013 was mankind’s dirtiest year ever – is a matter of life and death. This is especially so for poor subsistence farmers in Africa and other developing economies. Whether by war or by crop failure, it is always the poor who bear the brunt.Cardinal Pietro Parolin, Vatican Secretary of State, reminded the United Nations this week of its own fundament