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As factories around the world are shutting down due to the corona virus, carbon dioxide emissions have also decreased. As carbon, the cause of climate change, has decreased, the temperature will naturally decrease. Last year's temperature was the second highest on record.



Reporter Seo Dong-gyun pointed out the reason.



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A climate change monitoring station located in Anmyeon-do, Taean, Chungcheongnam-do.



The carbon dioxide concentration is measured by absorbing the atmosphere from a spire 80 meters above the ground.



The measured value here is used as the Korean standard, and the measured carbon dioxide concentration here in 2020 is 420.4 ppm.



It was an all-time high.



[Kim Soo-min / National Institute of Meteorology Researcher: The annual average in 2021 is also predicted to rise compared to 2020, and I think it will continue to rise for a while.]



In fact, last year's temperature was the second highest since 1973. I cried.



Even though global carbon dioxide emissions are decreasing due to the aftermath of COVID-19, the concentration in the atmosphere has risen.



Because of the rate of carbon dioxide decomposition.



When carbon dioxide is decomposed, it is absorbed into water or land, which takes an average of 100 years.



Therefore, even if the amount of emission decreases, the amount that accumulates more than the amount that decreases, so the concentration rises.



So, what would happen if we could prevent the concentration increase with carbon neutrality and further reduce the concentration?



A Korean research team predicted climate change by controlling carbon dioxide concentration.



It is assumed that the carbon dioxide concentration, which has risen in the future, has succeeded in returning it to the present level.



Temperatures have been warmer than they are now for hundreds of years, and daily precipitation has increased by 16%.  



The cause is the sea.



Because the ocean responds slowly to heat, it does not move proportionally as the carbon concentration decreases.



In other words, when the continents cool, the sea surface temperature rises, creating a climate that is completely different from the one we have known so far.



[Ye Sang-wook/Professor of Ocean Convergence Engineering, Hanyang University: Because our climate system is highly likely to be an irreversible system, the probability of returning to the previous state is lower...

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To prevent climate change, the remaining temperature is 0.4 degrees.



If you go higher than that, you can't go back to the old climate even if you achieve carbon neutrality and carbon reduction.



(Video coverage: Kim Gyun-jong, video editing: Lee Seung-yeol, CG: Shim Soo-hyun)