The concentration of CO2 in the atmosphere is increasing record

Mauna Loa is the oldest monitoring station for the world's carbon dioxide (CO ₂ ), located on the Mauna Loa volcano in Hawaii. On May 9, Mauna Loa said the atmosphere above Mauna Loa volcano reached a critical level: For the first time since 1958, the average daily carbon dioxide concentration reached 400 parts per million.

In the spring of 2012, carbon dioxide concentrations in Alaska, Canada and a few other locations near the Arctic exceeded 400 parts per million. Parts of the southern hemisphere are likely to reach this level within the next few years. Scientists at the US National Oceanic and Atmospheric Administration (NOAA) said that by 2016, the global average of greenhouse gas emissions will reach 400 parts per million.

The last time the CO ₂ concentration reached such a high level in the Pliocene period, ie 2.6 to 5.3 million years ago, then the summer in the Arctic was 8 degrees warmer than it is now. has skyrocketed due to the increase in fossil fuel use after the industrial revolution, when the average global concentration was 280 parts per million.

Concentration of CO ₂ has been increasing rapidly in recent decades. In the late 1950s, CO ₂ concentrations increased by about 0.7 parts per year, but in the last 10 years, it has increased to 2.1 parts per year.