Climate Change Which is Supposedly Scientific Knowledge Changed from Cooling to Warming in 80’s so Why is That?

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In the 1970’s, the same factors said today to be causing global warming were said to have been causing global cooling, and because there has actually been negligible-to-no warming during the last decade, it’s no longer global warming rather “climate change,” so considering too that the sea level hasn’t risen (since circa 1400 b. c.), “manmade climate change” is clearly a farce.