When you consider the income and compare the top 10 percent income in a city with the bottom 10 percent, the lower-income neighborhoods have 41 percent less tree cover. Health experts say areas with more trees tend to be cooler and healthier.
"When you have trees, you can bring your temperature down somewhere between 2 and 10 degrees just by having tree canopy," said Suzanne Hansen, an environmental sustainability specialist for Allina Health.