Climate change and human activity are increasing the likelihood of widespread epidemics and pandemics . The fragmentation of natural habitats is shrinking animals’ living spaces, making it easier for animal diseases to pass to humans. Floods and droughts, exacerbated by climate change, increase infectious diseases, and ancient pathogens may be released from thawing permafrost. Mobility accelerates the rapid spread of diseases. Future pandemics can be prevented by preserving animals’ habitats and biodiversity.