Caroline's dream is to build a carbon-neutral house in the countryside. It's a dream stimulated by, amongst others, Kevin McCloud the presenter of Grand Designs.
Yesterday, Kevin was one of many celebs. who was announced as having signed up to 10:10, the pledge to try to cut our individual carbon emissions by 10% next year, in order to put pressure on politicians that we want tougher action - a very grand design, indeed - on global warming. Some of them were asked "Do you know what your carbon footprint is?" I liked playwright Kwame Kwei-Armah's candid answer to this question: "Absolutely not. It's a bit like looking at your bank account when you're overdrawn. You just don't want to think about it."
Having sounded off just the other day about air-borne pilgrimages, I also liked the answer Kevin McCloud gave to the question: "Who in the world would you like to sign up to the 10:10 pledge?" "I think," he said, "if it's not going to be Jeremy Clarkson, it's the Pope. He's responsible for the ethical position of tens of millions of people worldwide. And responsible for millions flying to see him in St Peter's Square. He should be encouraging all those nuns to quit the plane and make the pilgrimage on foot."