sentences:  Ithaca College archaeologist, Thomas Garrison, says he believes the scale and population density has been "grossly underestimated and could in fact be three or four times greater than previously thought".According to Global Heritage Fund and World Monuments Fund, El Zotz is endangered by insufficient management, looting, deforestation, and natural disaster, as well as general threats (agriculture, poaching, forest-fires, and illegal extraction) to the Maya Biosphere.El Zotz has at least two principal ceremonial centres.