Groundwater pumping alters Earth's axis tilt.

Human depletion of underground reservoirs, mainly caused by irrigation, has caused the North Pole to shift at a speed of 4.36 centimetres per year, according to a study published in Geophysical Research Letters. The net water lost from underground reservoirs between 1993 and 2010 is estimated to be more than 2 trillion tons, causing a measurable tilt in the planet's axis of rotation. The depletion of groundwater has shifted the global distribution of water, leading to a water crisis.