Carbon dioxide level measures global distribution and variation of the concentration of mid-tropospheric carbon dioxide in parts per million (ppm).
According to the readings taken at NASA’s Mauna Loa Observatory in Hawaii, carbon dioxide level on earth have officially hit 415 ppm in May 2019. This is the first time in human history that carbon dioxide level has reached 415 ppm. At the previous time when earth’s carbon dioxide was at this level of concentration, the sea levels were 25 meters higher. That happened around 3 million years ago.
Carbon dioxide is an important heat-trapping (greenhouse) gas, which is released through human activities such as deforestation and burning fossil fuels, as well as natural processes such as respiration and volcanic eruptions.
Earth’s temperature rise could no longer be explained by natural factor. With the unprecedented amount of carbon dioxide released into the atmosphere due to human activities, earth climate will change drastically and cause sea level rises, flooding, severe storms and droughts among other problems, threatening human survival.