A new analysis has found that exposure to toxic air, water, soil and chemicals kills 8.3 million people across the world each year. The landmark research was published by the Global Alliance on Health and Pollution on Wednesday and it warned that pollution kills three times as many people a year as HIV/AIDS, tuberculosis and malaria combined. It is also responsible for 15 times the number of deaths caused by war and other forms of violence annually. The vast majority of deaths, more than 90%, occur in low and middle-income countries.