How do natural atmospheric changes compare to those caused by humans?

• A. They are more severe
• B. They are less severe but still present
• C. They never occur
• D. They are identical to human-caused changes

Answer: (B)

Natural fluctuations in the atmosphere do occur all the time. They come from things like volcanic eruptions, variations in solar energy, and natural climate cycles (such as El Niño and La Niña), which can cause short-term warming or cooling and regional differences. However, the current large-scale, long-term changes in climate are driven primarily by human activities—burning fossil fuels, deforestation, and other emissions that trap heat. Those human-caused effects produce a stronger, more rapid trend than natural variability. So natural changes are real and can be noticeable, but they’re typically less severe in scale and pace than the changes driven by humans.