Comparing gas bubbles within layers of antarctic ice show that fossil fuel use has raised the amount of in the air to the highest levels in human history. a. carbon dioxide b. greenhouse gas c. lead d. mercury

Comparing gas bubbles within layers of Antarctic ice helps show that fossil fuel use has raised the amount of A. Carbon Dioxide in the air to the highest levels in human history.
Gas bubble in the antarctic shows the condensed component of air in the earth. Recent research of gas bubble shows that the carbon dioxide amount in the earth reaches the highest amount compared to the previous years.

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