In real world, emissions are much higher than in lab tests: Study

New Delhi: Real-world vehicle emissions are much higher than laboratory tests suggest and CNG vehicles, once considered a cleaner alternative, actually emit high levels of nitrogen oxides, according to a new study.

Conducted as part of The Real Urban Emissions (TRUE) Initiative in collaboration with authorities in Delhi and Gurugram, the study utilised non-intrusive remote sensing technology to measure the emissions of on-road vehicles.

The study, conducted with technical analysis by the global think tank International Council on Clean Transportation, revealed that nitrogen oxide (NOx) emissions from BS-VI private cars were 81 per cent lower than those from BS-IV cars. Similarly, BS-VI buses produced 95% lower NOx compared to BS-IV buses.