"I am a great believer in the power of the individual to make change, and this applies as much to how we travel or spend our money as to the way we bring up our children. After all, one can only lead by example. In my view, this means always asking the best of oneself – standing by one’s principles, speaking up when others are silent, or reining in one’s sense of entitlement. So I’d ask everyone to start taking small steps, every day, that favour the environment. Join hands with us. Together, we become a powerful force for change."