Text: ““Kenya pollution: How air sensors are helping people fight pollution.” BBC.com
The article shows the lengths that John Kieti went to get accurate pollution data to help improve air quality:
“The results were shocking. The measurement indicator… showed that the air was heavily polluted,” Mr Kieti recalls.
The air pollution sensors measure the amount of fine particulate matter (PM2.5), which are particles of 2.5 micrometres and smaller in diameter – about 20 times smaller than a grain of sand and small enough to get into the blood stream.
That data is then transmitted to a website, where it can be accessed for free by anyone.” https://www.bbc.com/news/world-africa-50647465
In this specific example facts (in the form of air pollution data) are extremely important in pushing for change.