Paragraph 2
There are viruses in the permafrost that are up to a
years old. A
said these unknown, "
viruses" could be terrifying because we have never seen them
. He also said
diseases like smallpox could be released
. Factor X could be an even bigger
. However,
say the release of methane is a bigger
from melting permafrost. Methane is 80 times more
than CO2.