| GQ..... 1. What does parts per million mean? 2. What is the current level of atmospheric CO2 today? 3. What was it in 1950? | 4. What was the highest concentration before 1950? 5. Do you notice a pattern? explain 6. How do you think we know CO2 concentrations from 650,000 years ago? |
Any other questions you have regarding this graph?
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