The global average concentration of carbon dioxide in March this year was 4.7 parts per million (or ppm) higher than it was in March last year, a record-breaking increase attributed to El Nino and greenhouse gases from human activities.
The global CO2 readings have been taken from a station perched upon the Mauna Loa volcano in Hawaii since 1958, showing a rapid increase in CO2 levels over the years due to emissions from various sources.
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