Just weeks after Pittsburgh hosted the G20 Summit, renamed the Pittsburgh Summit, the city was selected by the United Nations to host yet another global event: World Environment Day. The Pittsburgh Business Times reports that the Bayer Corporation was "instrumental" in Pittsburgh being chosen while the Pittsburgh Post Gazette mentions the city's significance as the birthplace of famed environmentalist Rachel Carson. The United Nations Environment Programme (UNEP) regional director, Amy Frankel, says Bayer is a partner in planning World Environment Day and that the city (home to Bayer's U.S. headquarters) is a leader in "environmental and sustainability progress, particularly in the areas of biodiversity, green jobs and workforce development, and environmental education."

The theme of the event will be "Biodiversity: Connecting with Nature," and it is scheduled to take place June 5. According to the Post Gazette, there will be a series of activities linking the event with Earth Day, celebrated April 22. According to the UNEP, the day was established in 1972 by the U.N. general assembly and aims to "stimulate worldwide awareness of the environment and [enhance] political attention and action." Activities throughout the day will involve both education and service.