![Skyscraper Symphony](https://image.tmdb.org/t/p/w185/eiBkaxR5psPXrZtX25ZabRaMrON.jpg)
What would you say if you were told that airplanes were regularly spraying toxic aerosols in the skies above every major region of the world? That is exactly what a group of protestors were claiming outside of the annual American Association for the Advancement of Science (AAAS) meeting that was held in San Diego from February 18-22.