Earths most recent glacial period ended about _____ years ago.

Question

The Great Oxygenation Event began about ____ years ago
About _____ years ago carbon dioxide began increasing exponentially to unprecedented levels
Options
2.3 billion
150
11,500

Answer 1

Here are the correct answers based on the options provided:

1. Earth's most recent glacial period ended about 11,500 years ago.
2. The Great Oxygenation Event began about 2.3 billion years ago.
3. About 150 years ago carbon dioxide began increasing exponentially to unprecedented levels.

So the filled blanks are:

• Earth's most recent glacial period ended about 11,500 years ago.
• The Great Oxygenation Event began about 2.3 billion years ago.
• About 150 years ago carbon dioxide began increasing exponentially to unprecedented levels.