SimilarityRank
environmental_problem 0.738 25380
global_challenge 0.726 41446
environmental_issue 0.661 11632
environmental_degradation 0.656 26308
environmental_crisis 0.645 74211
environmental_concern 0.638 27548
global_problem 0.628 66690
economic_challenge 0.623 92616
climate_change 0.616 1527
sustainability_issue 0.608 67594
these_challenge 0.607 16957
environmental_change 0.604 25132
water_scarcity 0.602 48604
global_climate_change 0.599 29854
global_issue 0.590 34072
loss_of_biodiversity 0.589 94363
environmental_risk 0.589 55873
environmental_pollution 0.589 52695
the_effect_of_climate_change 0.586 44525
biodiversity_loss 0.586 86453
climate_change_impact 0.585 52284
address_climate_change 0.584 69629
a_change_climate 0.582 77526
sustainable_development 0.580 5196
health_challenge 0.579 91517