Answer:
was about equal to , exceeds
Step-by-step explanation:
- At the beginning of the industrial revolution, the carbon content was around 280 ppm and was stable for some time, and later on as of today it has exceeds the 400 ppm atmospheric pool of gases.
- Due to the increase in the amount of the greenhouse gas concentration and the burning of the fossil fuels and along the increase of the urbanization processes accelerated the speed of the carbon dioxide in the air.