What really caused the Flint water crisis?
The obvious and well-known answer is the April 2014 decision to start drawing the city's drinking water from the Flint River. That, in turn, caused corrosion in the city's lead water pipes, which caused lead to leach into the water.
Others point to Governor Rick Snyder's appointment of an emergency manager to control Flint's affairs. That happened in late 2011.
Michigan State University public health expert and urban geographer Rick Sadler argues the true cause of Flint's water disaster goes back decades.