Urban agriculture helps to address local food insecurity issues in cities and suburban areas. Growing food in cities can take the form of backyard, roof-top and balcony gardening, community gardening in vacant lots and parks (sometimes spanning several city blocks), roadside urban fringe agriculture, livestock grazing in open space and intensive indoor hydroponic or aquaculture facilities. Urban agriculture eases access to food, reconnects communities to the practice of growing food, and engages the community on a variety of levels. Increasing tree canopy is often considered in urban climate change adaptation plans, where trees can help reduce local heat island effects, control storm water, and improve air quality. Although urban trees can be an important part of adaptation solutions, they also can be vulnerable to the impacts of climate change. These urban trees may be experiencing stress from improper planting, restricted rooting conditions, road salt, and air pollution already, and therefore extremely vulnerable to climate change.