Guardian: So at last we have an explanation. During my video interview with Jeroen van der Veer, the chief executive of Shell, I asked the same question 15 times: "What is the value of your annual investments in renewable energy?" After several attempts to change the subject, he admitted that he knew the figure, then flatly refused to reveal it. Nor could he give me a convincing explanation of why he wouldn’t tell me, claiming only that "those figures are misused and people say it is too small" …