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A <br />aINTRODUCTION I Why the City Needs an Urban Forest Master Plan <br />Figure 1-2. Urban Heat Island Effect <br />The Urban Heat Island Effect <br />Solar energy is Heat is absorbed Heat is slowly emitted Increased temperatures <br />emitted by the sun. © and retained by throughout the day and discourage pedestrian <br />dark, urban surfaces. evening, increasing traffic, negatively impacting <br />temperatures. local economy. <br />No trees to absorb <br />auto emissions <br />Wit. <br />Source: EPA 2019, 2020 <br />4 1 CITY OF PLEASANTON URBAN FOREST MASTER PLAN <br />