This is good information but omits some key details. Many urban street trees were planted during greening actions during the 1970s and those trees have lifespa

This is good information but omits some key details. Many urban street trees were planted during greening actions during the 1970s and those trees have lifespans in those environments of about 50 years which means that we can expect large scale die offs of urban trees and should consider not only planting replacement trees but also putting in place a strategy of regularly removing aging or otherwise troubled trees in order to replace them with new trees so that ongoing plantings prevent this kind of large scale die back in the future.