A foreign policy reporter and her Iraq veteran husband turn their sights on the hidden impact the US military has on the planet, after the birth of their first child creates anxiety about the climate crisis. Their investigation exposes a secretive and constantly expanding web of pollution, cover-ups and unaccountability by the world's biggest polluter.

Earth’s Greatest Enemy reveals a hidden truth rarely questioned in mainstream reporting: the role of the U.S. military as the world’s largest institutional polluter, tracing the link between war, empire, and ecological destruction. Drawing on powerful testimonies from veterans, scientists, and frontline communities, it uncovers how military operations poison ecosystems, accelerate global warming, and sacrifice the future for endless expansion. From Alaska’s melting glaciers to contaminated bases across the U.S. and toxic battlefields abroad, Earth’s Greatest Enemy delivers a provocative and unflinching examination of the untouchable institution playing an outsized role in the climate crisis.