11.05.2013 | Source:
Pravda.Ru
The last time this level of carbon dioxide arose on Earth about 3.5 million years ago, before the last ice age. During the study, researchers examined the relic air bubbles preserved in the fossil samples of ice in Antarctica, getting data for the last 800,000 years. It is reported that during this period, the level of carbon dioxide in the atmosphere is 200-300 ppm. The current growth rate is 100 times higher than the rate of increase in the concentration of gas, which is considered to be one of the causes of the greenhouse effect and scale of climate change on the planet.
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