Related by context. Frequent words. (Click for all words.) 66 temperate zones 62 subtropics 62 temperate regions 61 tropics 59 equatorial Pacific Ocean 59 temperate forests 59 tropical climates 56 equatorial Pacific 55 avian influenza viruses 55 arid regions 55 El Nino warming 55 biodiversity hotspots 54 Genital herpes 54 atmospheric circulation 54 Polar Regions 53 equatorial regions 53 Pneumonic plague 53 terrestrial ecosystems 53 tropical 53 eastern equatorial Pacific 52 latitudes 52 Plasmodium falciparum 52 fungal spores 52 Qinghai Tibet Plateau 52 subtropical 52 northern latitudes 52 temperate climates 52 hydrological cycle 52 biodiversity hotspot 51 chytrid fungus 51 mid latitudes 51 troposphere 51 volcanically active 51 Ultraviolet light 51 coral bleaching 51 Coral reefs 51 mosquito transmitted 51 Migrating birds 51 Chlamydia trachomatis 51 landmasses 51 avian species 50 poleward 50 avian flu viruses 50 visceral leishmaniasis 50 parasitic diseases 50 Droughts 50 Volcanic eruptions 50 Cyanobacteria 50 El Ninos 50 Pacific Decadal Oscillation 50 pandemic influenza virus 50 degrees Fahrenheit warmer 50 Noroviruses 50 insect borne diseases 50 El Nino phenomenon 50 driest continent 50 priests shuffled 50 Influenza viruses 49 aerosol particles 49 Seasonal influenza 49 lowland forests 49 Amazon basin 49 amphibian species 49 Chagas disease 49 tropical cyclones 49 herpes viruses 49 Dengue fever 49 infects humans 49 organisms 49 influenza epidemics 49 ocean ridges 49 drylands 49 harmful algal blooms 49 bacteria fungi 49 invasive cervical cancer 49 diarrheal disease 49 highly pathogenic H#N# 49 river deltas 49 Infestations 48 tropical diseases 48 prolonged droughts 48 Monkeypox 48 tropical rainforests 48 Rift Valley fever 48 Aedes aegypti mosquito 48 Nematodes 48 Wolbachia 48 schistosomiasis 48 mountain glaciers 48 La Nina pattern 48 HPAI 48 CO2 concentrations 48 coral species 48 influenza viruses 48 multidrug resistant 48 Tularemia 48 species 48 haemorrhagic fever 48 parasitic worms 48 Tibetan Plateau 48 Severe drought