So, City of London, you’ve declared a climate emergency; good! There’s plenty cause for alarm — and besides, all the cool cities are doing it. It’s a bold and well-meaning statement of intent, but will you now do what’s needed? Are you willing to make sacrifices, and unflinchingly exercise power to address the problem? I’d like to hope this is real, but I wonder if you realize the scale of this commitment. If you are serious, then there’s no half-measures — and no going back.