The article is an interesting and provocative paper that derives its ideas from recently published research results and discoveries about the ambivalent role of atmospheric halogens (chlorine) in controlling the global abundance of tropospheric O3, OH and CH4. It discusses and proposes a possible roadmap to explore how artificially released iron chloride aerosols could reduce the atmospheric CH4 burden to mitigate its climate impact. The authors call for interdisciplinary efforts while keeping in mind ethical concerns and social impacts due to the proposed method.