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CO(2) content of atmosphere has increase...

`CO_(2)` content of atmosphere has increased in the last 150 years from

A

200 ppm to 300 ppm

B

350 ppm to 450 ppm

C

280 ppm to 370 ppm

D

120 ppm to 280 ppm

Text Solution

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The correct Answer is:
To solve the question regarding the increase in carbon dioxide (CO₂) content of the atmosphere over the last 150 years, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Context**: Recognize that the question is asking about the historical increase in atmospheric CO₂ levels over a specific time frame (the last 150 years). 2. **Identify Historical CO₂ Levels**: From the transcript, we learn that in the year 1750, the CO₂ concentration was approximately 270 parts per million (ppm). 3. **Identify Recent CO₂ Levels**: The transcript also mentions that by the year 2000, the CO₂ concentration had risen to about 340 ppm. 4. **Calculate the Range of Increase**: The increase in CO₂ levels from 1750 to 2000 can be calculated as follows: - Starting level in 1750: 270 ppm - Ending level in 2000: 340 ppm - Therefore, the increase is from 270 ppm to 340 ppm. 5. **Determine the Correct Option**: The options provided are: - 200 ppm to 300 ppm - 350 ppm to 450 ppm - 280 ppm to 370 ppm - 120 ppm to 280 ppm The range of increase (270 ppm to 340 ppm) fits best within the option of 280 ppm to 370 ppm. 6. **Conclusion**: Thus, the correct answer to the question is **280 ppm to 370 ppm**. ### Final Answer: The CO₂ content of the atmosphere has increased in the last 150 years from **280 ppm to 370 ppm**. ---
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