SimilarityRank
fossil-fuel 0.797 91442
non-renewable 0.775 56124
fuels 0.747 9417
carbon-based 0.745 97409
methane 0.718 19799
fossils 0.717 23150
Fossil 0.707 37061
biomass 0.701 16091
anthropogenic 0.690 46957
coal 0.689 5233
fossilized 0.688 60659
biofuels 0.676 26111
shale 0.675 17984
carbon 0.663 3087
biofuel 0.662 33305
thorium 0.661 70297
hominid 0.657 82094
deforestation 0.648 27552
hydrocarbon 0.647 36213
hydrocarbons 0.645 32458
earths 0.643 47315
hominids 0.642 99822
extinctions 0.640 71406
feedstocks 0.637 76964
emissions 0.631 4569