 PITTSBURGH, Aug. 16, 2021 PRNewswire -- Koppers Holdings Inc. NYSE: KOP today announced that it has issued its 2020 Corporate Sustainability Report CSR, detailing the companys progress across its three key Sustainability pillars People, Planet and Performance. Over the course of the year, the company placed considerable emphasis on strengthening its Sustainability governance structure and developing strategy-defining goals to drive long-term performance for all its stakeholders. 