Cities and communities across the country lost an estimated 36 million trees each year from 2009 through 2014.  A study, Declining Urban and Community Tree Cover in the United States, conducted by scientists from the United States Department of Agriculture Forest Service reviewed aerial photos of tree coverage in all 50 states and Washington, D.C., and found that coverage is declining at a rate of about 175,000 acres per year – about 36 million trees per year.  Pavement and other impermeable cover increased at a rate of about 167,000 acres per year, according to the study, which was published in the journal Urban Forestry and Urban Greening.

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