In terms of the sheer number of monument trees, Bursa -- which is known as "green Bursa" despite the negative environmental impact of the city's uneven growth in recent years -- is a prominent city in Turkey.
Most of Bursa's monument trees are sycamores. In fact, a full 541 of the 870 monument trees in this "city of historical sycamores" are registered as eastern sycamores. The city also boasts 170 oaks and 87 cypress trees that are classified as monument trees.
The care, treatment and restoration of these monument trees, which have in themselves become a defining characteristic of Bursa, are carried out according to guidelines set forth in the municipality's "Tree Protection Policy." As a part of this policy, a special paste is now being applied to any open parts of these trees' trunks and branches to ensure the trees' longevity. The paste contains antibacterial chemicals that will help prevent the historic trees from damage and rot as a result of harmful outside environmental influences over the years. The paste is also water-resistant, and its protective effects will last for 20 years. The municipality is also working to sterilize the soil around the roots and trunks of Bursa's monument trees against the threat of fungus. An antibiotic that fights rot and fungus has also been added to the trees' water supply.