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1. 1 2019-07-16T20:00:23-07:00 Henry Brannan 74f555c10dca87cd5cf0f959225891d3bf58414d San Francisco Pollution Burden by Census Tract 3 This map uses data from the CalEnviroScreen 3.0, a tool that is used to examine neighborhood differences in exposure to multiple sources of pollution. Here we visualize the June 2018 CalEnviroScreen results and the 2010 census Black population for San Francisco by census tract to show the relationship between Black population density and pollution bird the darkest red color represents the highest pollution burden and the lightest yellow color represents the lowest pollution burden. Areas where Black residents make up 20% or more of the total population are highlighted below. media/SF Pollution Burden by Census Tract.png meta 2019-07-17T19:08:24-07:00 Henry Brannan 74f555c10dca87cd5cf0f959225891d3bf58414d