Natural carbon sinks have generally matched the production of carbon dioxide until ________.
A) the end of the last ice age,approximately 16,000 years ago
B) the Little Ice Age,approximately 400 years ago
C) approximately 1900
D) the Eocene Epoch,approximately 50 million years ago

Question

Quizplus · Accepted Answer

Natural carbon sinks have generally matched the production of carbon dioxide until approximately 1900 when human activities such as burning fossil fuels and deforestation started to significantly increase the amount of carbon dioxide in the atmosphere.

Natural Carbon Sinks Have Generally Matched the Production of Carbon