If the `CO_(2)` content of the atmosphere is as high as 300 parts per million

Options

A. All plants would get killed.
B. The plants would you grow properly.
C. Plants would grow for some time and then die
D. The plants would thrive well.

Answer

**Step-by-Step Solution:**

1. **Understanding CO2 Concentration**: The question states that the CO2 content of the atmosphere is 300 parts per million (ppm). To understand this, we need to know what 1 ppm means. 1 ppm is equivalent to 1 milligram of a substance (in this case, CO2) per liter of air.

2. **Effects of CO2 on Plants**: Plants utilize carbon dioxide during photosynthesis, which is essential for their growth and development. A certain concentration of CO2 is necessary for optimal plant growth.

3. **Normal Growth Range**: Research indicates that plants can generally thrive well in CO2 concentrations up to 400 ppm. Therefore, a concentration of 300 ppm is within the normal range for plant growth.

4. **Conclusion**: Since 300 ppm is below the threshold of 400 ppm, plants will develop normally without any adverse effects. Thus, the answer to the question is that plants would thrive well.

**Final Answer**: If the CO2 content of the atmosphere is as high as 300 parts per million, the plants would thrive well.

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