This covers in detail one day of gassing in one place, if an intense one, but between PPB and the feds tear gassing went on for months and extended into neighbo

This covers in detail one day of gassing in one place, if an intense one, but between PPB and the feds tear gassing went on for months and extended into neighborhoods on both sides of the river. The long-term impact on plant growth in repeatedly gassed neighborhoods alone is incredible.