Press Trust of India: Air pollution has had a significant impact on the amount of water flowing through many rivers in the northern hemisphere, a new study has found. The study shows how aerosols can have an impact on the natural environment and highlights the importance of considering these factors in assessments of future climate change, researchers said. It is already established that increased burning of sulphurous coal up to the late 1970s led to additional aerosols in the atmosphere. These are reflective and...