SimilarityRank
ozone 0.807 5037
anthropogenic 0.783 51620
acidification 0.780 21870
stratospheric 0.780 25293
organochlorine 0.774 48475
eutrophication 0.771 42648
tropospheric 0.770 67421
carcinogen 0.762 23531
nox 0.759 28969
caesium-137 0.758 59747
deforestation 0.753 16781
malathion 0.751 55530
salinisation 0.749 55212
vocs 0.747 67555
desertification 0.747 27119
uv-b 0.746 63631
phytoplankton 0.744 28965
pollutant 0.744 10281
photochemical 0.741 30345
salinity 0.739 22106
nitrate 0.735 7756
overgrazing 0.733 43790
contaminant 0.731 23773
polonium-210 0.730 71984
overfishing 0.729 60336