For the most part, the rapid expansion of cities takes place without any land use planning strategy and the resulting human pressure has highly damaging effects on forests, landscapes, as well as green areas in and around cities. The environmental impacts of urbanization are often intensified by climate change and include increased pollution, decreased availability of food and resources, as well as increased poverty and frequency of extreme climatic events. Also urban trees can help to mitigate some of the negative impacts and social consequences of urbanization, and thus make cities more resilient to these changes.