Humans’ environmental rap sheet gets longer
Ice cores reveal air pollution 240 years before the Industrial Revolution
![Quelccaya Ice Cap in Peru](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/02/bm_14-21119-large.jpg?fit=860%2C460&ssl=1)
SMOG ALERT Ice cores from the North Dome of the Quelccaya Ice Cap in Peru reveal that humans polluted the air long before the Industrial Revolution.
Image courtesy of Paolo Gabrielli