but that's something the mayor of christchurch, bob parker, intends to reverse. he's in asia to declare the city open for business. i spoke to him earlier today about the city's future and asked why it would be attractive to foreign investors. >> the scale of demolition and reconstruction in the heart of christchurch city is something unprecedented in western cities since the second world war. it's massive. i'm talking way over 50% in the core of the christchurch cbd that will be replaced, whole blocks completely clear felled. and we have a chance to build something utterly unique. we had a 19th-century city, which was a response to the reformist thinking back in the 1800s. >> so, what are you going to do? >> we're going to build a 21st-century city, a sustainable city, a green city, if you like. the writing is on the wall for that, looking at the impacts of the cost of energy, looking at how we treat the environment that we're in, the sustainable materials, looking at our carbon footprint and creating a new city that will resonate in the new century, particularl