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More people around the world now die from air pollution than malaria, tuberculosis and HIV combined, according to a 2016 study in the journal Nature led by Johannes Lelieveld, director of the Max Planck Institute for chemistry in Germany. In Cairo alone, it was estimated in 2012 that the deaths of around 43,000 Egyptians were related to air pollution, with heart disease, stroke and respiratory infections cited as the top causes of premature death. “When I noticed how serious the problem was,…