In one troubling case, dozens of people were sickened − and thousands of reindeer were killed − when anthrax spores emerged from the thawing permafrost in an Arctic region of Siberia.
Climate hazards such as flooding, heat waves and drought have worsened more than half of the hundreds of known infectious diseases in people, including malaria, hantavirus, cholera and anthrax, a study says.
In Earth's coldest regions, warming could lead to the revival of dormant diseases, even as more people arrive to man new military bases and oil and gas facilities.
There's a new fear from climate change: Bacteria and viruses buried in frozen ground coming back to life as the Arctic warms up. We went digging in permafrost to find out how worried we should be.
