The World Health Organization (WHO) warns that air pollution is of great concern and impacts health in many ways. To better the situation, it’s necessary to focus on air quality. However, when ...

Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...

The USDA’s Food Safety and Inspection Service is continuing its sampling plan and has published updates for the 2025 fiscal year. The plan is designed to leverage technological and sampling advances ...