Question

Earth's most recent glacial period ended about Response area years ago.

The Great Oxygenation Event began about Response area years ago.

About Response area years ago carbon dioxide began increasing exponentially to unprecedented levels.

Answer 1

1. Earth's most recent glacial period ended about **11,700** years ago.

2. The Great Oxygenation Event began about **2.4 billion** years ago.

3. About **250 years ago** carbon dioxide began increasing exponentially to unprecedented levels, correlating with the onset of the Industrial Revolution.