over the past 250 years, humans have added just one part of co2 in 10,000 to the atmosphere.
over the past 250 years, humans have added just one part of co2 in 10,000 to the atmosphere.
carbon dioxide in earth's atmosphere:7
global annual mean co 2 concentration has increased by more than 45% since the start of the industrial revolution, from 280 ppm during the 10,000 years up to the mid-18th century to 415 ppm as of may 2019.