text:  For NPR News, I'm Mariana Bacayau in Nashville. A lack of affordable housing is not just a problem in the U.S. It's also an issue in other countries, and in New Zealand, officials think they may have a solution. Essentially easing land use restrictions is part of an effort to flood the market with affordable homes. The country's housing minister is proposing the powers of local councils to curb development essentially be overridden.