year atmospheric carbon dioxide (ppm) 1960 317 1990 354 2020 414 The table shows measurements of atmospheric carbon dioxide. Which human activity best accou...
Question 1 Report
| year | atmospheric carbon dioxide (ppm) |
|---|---|
| 1960 | 317 |
| 1990 | 354 |
| 2020 | 414 |
The table shows measurements of atmospheric carbon dioxide. Which human activity best accounts for this trend?
Answer Details
The table shows atmospheric carbon dioxide rising steadily over the decades. The human activity that best accounts for this is the increased burning of fossil fuels, which releases carbon that had been locked away for millions of years and adds it to the air faster than photosynthesis can remove it. More photosynthesis by forests would lower carbon dioxide, reduced animal respiration would not raise it, and rainfall does not control it. Fossil-fuel combustion is the main driver of the rising trend.
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