The Mexican authorities concluded last summer that industrial pollutants had killed the birds.
They believe that their area has suffered long enough from the effects of industrial pollutants.
Other industrial pollutants that promote warming have also increased significantly in the atmosphere.
In the last ten years, these dust storms have become a serious problem because they have picked up industrial pollutants.
That was caused by a heavy amount of industrial pollutants.
Moreover, she said, the new treatment plants cannot filter out some of the most toxic industrial pollutants in the sewage.
They are known to be carcinogenic and an industrial pollutant.
Alternatively, high levels of industrial and agricultural pollutants from the land might be to blame.
No sign of industrial pollutants in the oceans or atmosphere.
These record the amount of industrial pollutants that individual companies are allowed to dump in the waterways.