The Earth's atmosphere warmed by about $1^{\circ} C$ over the last 100 years and the global average surface temperature is projected to rise another $\qquad$ by the year 2100.
A. $1^{\circ}$ to $2^{\circ} C$
B. $2^{\circ}$ to $5^{\circ} C$
C. $1^{\circ}$ to $7^{\circ} C$
D. $2^{\circ}$ to $12^{\circ} C$
E. $4^{\circ}$ to $12^{\circ} C$
Answer (2)
The projected increase in global average surface temperature by 2100 is expected to be between 2 ∘ C and 5 ∘ C . This range is supported by climate models that consider various greenhouse gas emission scenarios. Therefore, the correct choice is 2 ∘ C to 5 ∘ C .
;
The problem requires identifying the projected global temperature increase by 2100.
Based on climate science, the projected range is between 2 ∘ C and 5 ∘ C .
Therefore, the correct answer is 2 ∘ to 5 ∘ C .
The final answer is: 2 ∘ to 5 ∘ C
Explanation
Understanding the Problem The question asks for the projected increase in global average surface temperature by the year 2100, building upon the 1 ∘ C increase observed over the last 100 years. We need to select the most plausible range from the given options, based on current climate science projections.
Determining the Projected Temperature Rise Based on reports from organizations like the IPCC (Intergovernmental Panel on Climate Change), a likely range for global temperature increase by 2100 is between 2 ∘ C and 5 ∘ C , depending on various emission scenarios and mitigation efforts.
Selecting the Correct Answer Therefore, the most appropriate answer from the given choices is 2 ∘ to 5 ∘ C .
Examples
Understanding climate change and predicting future temperature increases is crucial for policymakers and individuals to make informed decisions about reducing greenhouse gas emissions and adapting to the impacts of a warmer world. For example, knowing the projected temperature rise helps in planning infrastructure, agriculture, and public health strategies to mitigate potential risks such as sea-level rise, extreme weather events, and the spread of diseases. By understanding these projections, we can better prepare for the challenges and opportunities that climate change presents.
