Charcoal, which you get as a byproduct from woodfires, is a great sponge for neutralizing so many poison agents that having a pill containing activated charcoal may be a helpful emergency response when someone is having a toxic reaction to poison, or about to. That can be used to neutralize poison agents in an ecosystem and be diluted into the water, or used to improve the air quality, or even be used as fertilizer and be helpful in soil restoration.

https://www.pollutionsolutions-online.com/news/air-clean-up/16/breaking-news/can-charcoal-absorb-pollution/48538