Assertion: seawater's concentration | /r/CapableOf | reach 450 parts-per-million ppm
Facets:
Source sentences:
text: concentrations, is already having an effect at current concentrations, and is likely to cause grave harm to important marine ecosystems as concentrations reach 450 [parts-per-million (ppm)] and above; ...
text: 2 concentrations reach 450 [parts-per-million (ppm)] and above;