Palo Alto, a city with a median annual income of $158,000, has tree canopy coverage as high as 25% in some neighborhoods, according to the Healthy Places Index. Trees occupy a fourth of the land within the city. Adjacent East Palo Alto, where three in four residents are either Black or Latino, has a median income of $67,000. HPI shows one neighborhood with canopy coverage of 12%. The rest have 6%.