DETROIT (AP) — The city of Detroit could use more trees — about 1.2 million more, according to American Forests.

The Washington-based, nonprofit conservation organization on Tuesday published Tree Equity scores for 150,000 neighborhoods in 486 urbanized areas.

Each score is based on how much tree canopy and surface temperatures align with the number of people living in a given area or neighborhood, income, employment, race, age and health factors. The scores indicate whether there are enough trees for everyone living in those areas to experience the health, economic and climate benefits that trees provide.

Low-income, predominantly minority neighborhoods have fewer trees than wealthier, mostly white areas, according to Chris David, American Forests geographic information system and data science vice president.

Trees improve the quality of life in neighborhoods by providing shade that reducing heat-related health issues. They also improve air quality by helping to reduce air pollution and create jobs involved in the care of trees, the nonprofit said.

Data from the U.S. Census, Department of Agriculture and U.S. Geological Survey helped calculate the scores.

A score of 100 represents Tree Equity. Detroit’s score is 80. The Phoenix area has a score of 80 and Rhode Island’s Tree Equity is 73. Seattle has a score of 90.