In Peru, gold mining harms rain forests and human health. Satellite data can now track forest recovery in protected areas and the migration of informal miners to less regulated areas.
Isotopic analysis indicates that mercury found in deep-sea organisms may have an origin in carrion from near the surface.
Annual growth rings in trees tell us more than climate history; they can also document the rise and fall of human industrial activities.
Newly published measurements made downwind of West Virginia, Pennsylvania, and Ohio coal-burning plants reveal steep, unexpected drops in atmospheric mercury concentrations since 2006.
Drought conditions dictate whether atmospherically deposited sulfate stays locked in a peatland or is mobilized to stimulate the bacterial methylation of mercury.