As we all know, pigeons were once used as a communication mean in ancient times. Because of the great distance people had to cross to communicate with another party, they decided to train pigeons to deliver personal and political messages to kings, nobles, soldiers, and even lovers. But this is not everything pigeons can do. Californian scientists are currently training pigeons to detect air pollution, with the help of satellites and other equipment that are currently being invented to help locate pollution in the air. These electronic tools send signals, every thirty seconds, to inform scientists about the areas of pollution in the air.

The approximate cost of this experiment will be around two hundred and fifty million dollars ($ 250,000,000). Further information will be provided about this topic once scientists provide us with feedback about their first trial.