When you compare possible natural causes (orbital, solar and volcanic activity) over the course of the last 100+ years, to manmade causes (aerosols, deforestation and greenhouses gases), the winner is clear.
from Space.com ift.tt/2fswdgH
When you compare possible natural causes (orbital, solar and volcanic activity) over the course of the last 100+ years, to manmade causes (aerosols, deforestation and greenhouses gases), the winner is clear.
from Space.com ift.tt/2fswdgH
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