Question

Over the past 60 years, the level of carbon dioxide in the atmosphere has been continually increasing. Many scientists hypothesize that this increase has led to an imbalance in the carbon cycle and a climatic trend known as global warming.

In which of the following ways could humans help the carbon cycle return to normal?
A.
cap volcanoes so that they do not release more carbon dioxide
B.
pump nitrogen and oxygen into the air to help rebalance the atmosphere
C.
cut down trees and other large plants that depend on carbon dioxide
D.
reduce the amount of fossil fuels they combust

Answers

GPT-4o mini
The most effective way humans could help the carbon cycle return to normal from the options provided is:

**D. reduce the amount of fossil fuels they combust.**

Reducing fossil fuel combustion decreases the amount of carbon dioxide (CO2) emitted into the atmosphere, which can help mitigate the imbalance in the carbon cycle and address global warming.

The other options are not viable solutions for rebalancing the carbon cycle:

- **A. cap volcanoes** is not feasible or practical since volcanic eruptions are natural processes that cannot be controlled by humans.
- **B. pump nitrogen and oxygen into the air** does not directly address the carbon imbalance and may have other unintended ecological effects.
- **C. cut down trees and other large plants** would actually worsen the situation since these plants absorb CO2 from the atmosphere.