Climate change threatens everything we hold dear, even if you're an economist. The business case for boosting investment in renewables and energy efficiency is incredibly compelling. Yet still the Chancellor seems hell-bent on hitching our economy to the dirty energy infrastructure of the past. So here's what's topping my wish list on George's Big Day: let's put politics aside and have a cross party statement on the risk of climate change to the UK economy. What a sweet surprise that would be - and what true political leadership it would demonstrate.