[thecatwentup]

There are a lot of alarmist comments here - but the direct effect on humans is minimal up to 10,000ppm[1]. The effect on the environment on the otherhand isn't easy to predict.

[1] https://www.fsis.usda.gov/sites/default/files/media_file/202...

[shawabawa3]

Those statistics are for acute exposure. There are noticeable effects to cognition even under 1000ppm