Economic Times: The amount of black carbon or soot, a potential cancer-causing substance, has been gradually increasing over Pune city since 2005, shows a study conducted by the Indian Institute of Tropical Meteorology (IITM).
Soot is a human carcinogenic which is considered second only to carbon dioxide in causing climate change or global warming.
The research is still in its nascent stage, which means that scientists have still not been able to fix a maximum permissible limit for the substance. But scientists...