While much of Palau remains free of environmental degradation, areas of concern include illegal dynamite fishing, inadequate solid waste disposal facilities in Koror and extensive sand and coral dredging in the Palau lagoon. As with other Pacific island nations, rising sea level presents a major environmental threat. However, according to the Emissions Database for Global Atmospheric Research average carbon dioxide emissions per person were 60 tonnes in 2019, the highest in the world and mostly from transport.  Inundation of low-lying areas threatens coastal vegetation, agriculture, and an already insufficient water supply. Wastewater treatment is a problem, along with the handling of toxic waste from fertilizers and biocides.