When official pollution control boards release averaged daily figures, they often mask severe night-time pollution spikes. To counter this, investigative newsrooms are deploying low-cost, connected optical particulate sensors around industrial zones. These autonomous DIY devices record PM2.5 and PM10 levels every minute, proving that nearby factories deliberately disable scrubbers and vent toxic fumes under cover of darkness.

The Bharat Media Association champions sensor journalism as a transformative investigative tool. By generating immutable, real-time datasets, reporters provide indisputable scientific proof that environmental regulators cannot dismiss, effectively holding corrupt corporate polluters accountable to public health standards.