You don’t need a sensor to know which way the smog is blowing. In the most extreme cases, outdoor air pollution can immediately identified even without any special training.
Hearing evolved to alert humans to changes in their environments. But as our environments have gotten louder, our brains haven’t exactly evolved a mute button to cope with the change.
These days, it seems like data is all around us. But for many journalists, especially those working in developing countries, coverage of sensitive environmental issues is severely constrained by a lack of accessible information. What’s more, reliable information is difficult to collect in certain ecosystems, such as the Amazon rainforest or Ganges Delta, that are in constant flux.