The Bishop of London has declared that contributing to climate change by flying on holiday, driving a “gas-guzzling” car or failing to use energy-saving measures in the home is sinful. Richard Chartres will emphasize that it is a moral obligation for Christians to lead an eco-friendly lifestyle, and will encourage vicars to preach more green sermons. Chartres, who chairs the bishops’ panel on the environment, said: “There is now an overriding imperative to walk more lightly upon the earth and we need to make our lifestyle decisions in that light. Making selfish choices such as flying on holiday or buying a large car are a symptom of sin. Sin is not just a restricted list of moral mistakes. It is living a life turned in on itself where people ignore the consequences of their actions.”