This site provides an illustrative, population-level estimate (using India\'s average life expectancy of ~73 years only as context, not as a strict cap or target) of how many additional years a deceased loved one might have lived had ambient air pollution in their NCR region been absent.
The estimate uses region-specific baseline life-loss estimates, a simple historical trend factor (to account for higher PM2.5 in recent decades), exposure multipliers (outdoor time, indoor fuel, proximity to traffic/industry, mitigation) and vulnerability multipliers (age, smoking, chronic conditions). Results are heuristic and intended for awareness and memorial purposes, not clinical or legal use.
Age and sensitivity: Older bodies are generally more vulnerable to the harms of long-term air pollution. That means, all else equal, if your loved one was older at death we increase the modelled life-years taken by pollution proportionally; if they were younger, the pollution-driven life-loss is reduced. The calculator applies both an age-based vulnerability multiplier and an age-weight to the computed years to reflect this. To avoid implausible outcomes (for example, adding decades back to a very old person), the tool also applies conservative caps described below.
Mitigation of extreme values: To prevent unrealistic estimates we cap the calculated gain by: (a) the remaining years up to a contextual baseline life expectancy (≈73 years), and (b) an absolute hard cap (20 years) chosen as a conservative ceiling for illustrative purposes. These safeguards keep results reasonable while still reflecting that older people are more affected by pollution.
For rigorous attribution, implement age-sex life tables combined with exposure–response relative risks (GBD/IER) and local PM2.5 time series.