it depend what you call science, please not that about 66% of studies in major science journals are shown later, to be wrong. freedman.com
Almost 100% of long-term economic studies are proven to be wrong based on the grand-daddy of all studies related to experts, made by Philip Tetlock Professor of Organizational Behavior at the University of California, Berkeley. Prof. Philip Tetlock, spent 20 years following 300 elite media and government experts making 82,000 predictions. After 20 years, the predictions did a fraction better than a chimpanzee throwing darts at a board.
There are so many variables that affect the atmosphere that it is a waste of time to model it. Very big volcanic eruption definitely have a great impact on earth's climate, example Santorini Island in the mediterranean or more recently a volcano eruption of Mt. Tambora, Sumbawa Island, Indonesia, y 1600 Huaynaputina, in Peru or Mount Pinatubo, 1991
But all this does not negate, but enforce the fact that human activity does affect the global warming as all those eruption did pollute the atmosphere with aerosols, acids and dust
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