
Up to 2cm a month: Nasa keeps track as Mexico City sinks into the ground
<p>Powerful radar system is providing new data on city’s subsidence, which experts hope will draw more attention to it</p><p>Walking into Mexico City’s sprawling central <em>Zócalo</em> is a dizzying experience. At one end of the plaza, the capital’s cathedral, with its soaring spires, slumps in one






