Question

Drag and drop events that occurred billions or millions of years ago events that occurred thousands of years ago events that occurred decades ago
The last ice age ended carbon dioxide levels reach their highest levels on record oxygen builds up in Earth's atmosphere

Answer 1

Certainly! Here are the events categorized into different timeframes:

**Billions or Millions of Years Ago:**
- Oxygen builds up in Earth's atmosphere
- Carbon dioxide levels reach their highest levels on record

**Thousands of Years Ago:**
- The last ice age ended

**Decades Ago:**
- None of these specific events occurred in this timeframe.

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