Odd-even 1 more effective than phase 2, says TERI analysis

Odd-even phase one implemented in January was more effective than phase two in April in curbing the Capital\'s pollution, said an analysis by TERI. The think tank has released an impact assessment study on the two phases of the scheme that limited the number of private cars on the roads for a 15-day period. It observed that the scheme only led to \"marginal\" reductions (4-7%) of PM 2.5 pollutants during both phases as private cars make a limited contribution to the fine particles. TERI experts used a box model to delineate odd-even\'s effect on PM2.5 concentrations from daily changes due to meteorological factors such as wind speeds.