Research for the Department of Immigration and Citizenship has found more than 430,000 hectares of land will have to be found for housing in both Sydney and Melbourne if net overall immigration remains above 260,000 a year.
Even with zero migration, the capitals will grow in size by roughly 50 per cent, costing residents an extra $1000 a year due to added congestion within the next two decades.
<a href="http://www.theaustralian.com.au/national-affairs/cities-to-more-than-double-in-size-under-current-immigration-levels-says-news-research/story-fn59niix-1225993623319">Read here</a>