Coastal chemical pollution within 3 nautical miles (nm) offshore. For more details on the variable construction, see the original sources:

Halpern, B. S. et al. (2015). Spatial and temporal changes in cumulative human impacts on the world's ocean. Nature Communications 6(7615).

When using this variable, please cite both the OHI project and the original sources.

and

FAO's statistical database FAOSTAT (http://faostat3.fao.org/faostat-gateway/go/to/browse/R/*/E).

When using this variable, please cite both the OHI project and the original sources.