K K Jain We can channel our investments in a direction that would get us optimum results and not invest in the wrong place In most cities SPM levels are higher than permissible limits and this high SPM level is the real problem. Euro IV fuels, however, only help reduce SO2 and NOX levels. It follows, therefore, that no useful purpose would be served by reducing SO2 and NOX further POLLUTION levels in all Indian cities appear to be high. Doctors say this is giving rise to increasing number of people with respiratory and other diseases. So there is a clamour for less polluting fuels by upgrading our refining industry to