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Until the current warming trend exceeds the range of normal climatic f
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Updated on: 26 Jan 2026, 00:26
Updated on: 26 Jan 2026, 00:26
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Until the current warming trend exceeds the range of normal climatic fluctuations, there will be, among scientists, considerable the possibility that increasing levels of atmospheric CO2 can cause long-term warming effects.
| Blank (i) |
|---|
| A.interest in |
| B.uncertainty about |
| C.enthusiasm for | D.worry about | E.experimentation on |
Re: Until the current warming trend exceeds the range of normal climatic f
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26 Jan 2026, 00:27
26 Jan 2026, 00:27
Expert Reply
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Re: Until the current warming trend exceeds the range of normal climatic f
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26 Jan 2026, 00:27
26 Jan 2026, 00:27
Expert Reply
Sentence Analysis
The sentence uses a specific logical structure: "Until [Condition X] happens, there will be
[Blank] about [Result Y]."
- The Condition: The current warming trend must exceed "the range of normal climatic fluctuations." In other words, the warming has to become so extreme that it can no longer be explained away as natural "ups and downs."
- The Logic: If the warming is still within the "normal" range, it is difficult to prove definitively that human-caused $C O_2$ is the specific culprit. Because the data could still be interpreted as natural variation, scientists cannot be $100 \%$ sure yet.
- The Match: This lack of definitive proof leads to uncertainty about the causal link between $C O_2$ and long-term warming.
Why the other options do not fit:
- A. interest in: While scientists are certainly interested, the word "Until" sets up a threshold for proof. Interest doesn't depend on exceeding a range; if anything, interest exists long before the threshold is met.
- C. enthusiasm for: Scientists generally don't feel "enthusiasm" for the possibility of global warming; additionally, this doesn't fit the logical requirement of a skeptical threshold.
- D. worry about: While "worry" makes sense in a general context, in a scientific "proof" context, "uncertainty" is the more precise term for what happens before a trend is statistically significant.
- E. experimentation on: You cannot "experiment on" a global atmospheric possibility in the way this sentence describes; scientists observe and model it.
The sentence uses a specific logical structure: "Until [Condition X] happens, there will be
[Blank] about [Result Y]."
- The Condition: The current warming trend must exceed "the range of normal climatic fluctuations." In other words, the warming has to become so extreme that it can no longer be explained away as natural "ups and downs."
- The Logic: If the warming is still within the "normal" range, it is difficult to prove definitively that human-caused $C O_2$ is the specific culprit. Because the data could still be interpreted as natural variation, scientists cannot be $100 \%$ sure yet.
- The Match: This lack of definitive proof leads to uncertainty about the causal link between $C O_2$ and long-term warming.
Why the other options do not fit:
- A. interest in: While scientists are certainly interested, the word "Until" sets up a threshold for proof. Interest doesn't depend on exceeding a range; if anything, interest exists long before the threshold is met.
- C. enthusiasm for: Scientists generally don't feel "enthusiasm" for the possibility of global warming; additionally, this doesn't fit the logical requirement of a skeptical threshold.
- D. worry about: While "worry" makes sense in a general context, in a scientific "proof" context, "uncertainty" is the more precise term for what happens before a trend is statistically significant.
- E. experimentation on: You cannot "experiment on" a global atmospheric possibility in the way this sentence describes; scientists observe and model it.
