Geologist suspects wastewater facilities in increase in Yosemite rockfalls

For thousands of years, slabs of the Glacier Point cliff have broken loose, roared down at more than 100 mph and blasted the forest in nature's version of bunker bombs. Such rockfalls are triggered by earthquakes, large storms or freezing and thawing of water in granite joints. But are these frightening events also somehow connected to the toilets at the Glacier Point overlook above the sheer cliff?

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