Question

How was the carbon dioxide level kept in check before the industrial revolution?A. There were many more species before the Industrial revolution that used carbon.dioxide, keeping the level of it in the air lower.B. There was no carbon dioxide in the atmosphere before the Industrial revolution.C. Ancient civilizations had stone formations they used to capture carbon dioxide from theair.D. Carbon is stored in carbon sinks such as forests and oceans.

Answer 1

The concept of carbon dioxide is quite recent, previous to the industrial revolution there was no such concept so there were no measures taken to control carbon dioxide or even measure it: The carbon dioxide levels were controlled by natural means, therefore we can say that the correct answer is option D.