I am a 30 year resident of Arlington and a 45 year resident of the Washington DC metropolitan area, and my family and I have treasured our access to the priceless Chesapeake Bay.  It is being threatened by climate change, sea level rise, land subsidence, pollution, and land fill among other adverse impacts.  The law must be updated to prevent further landfill encroachment and support the maintenance of existing trees as well as the planting of new trees.  This authority for planting new trees should be maintained by local governments, and as an Arlington resident, I urge that Arlington County should have that continued authority over the lands within its jurisdiction.  Trees are essential for capturing rain water, slowing runoff, preventing erosion, stabilizing shore banks, and supporting native wildlife, let alone adding beauty and natural health to our region.  The updated regulations should prohibit the outright removal of mature trees for development or improved sight lines.  The aesthetic of nature is already there and should be preserved.  Thank you for the opportunity to comment.