Consider the following gases - a. Carbon dioxide b. Methane c. CFCs d. Nitrous Oxide Arrange these gases according to the decending order of their relative contribution to total global warming.
abcd
Arranging Greenhouse Gases by Global Warming Contribution
Global warming is primarily caused by the increase of certain gases in the Earth's atmosphere that trap heat, known as greenhouse gases. These gases contribute differently to the overall warming effect depending on factors like their concentration, atmospheric lifetime, and heat-trapping ability (Global Warming Potential or GWP).
The question asks to arrange the given gases based on their relative contribution to total global warming in descending order (from highest contribution to lowest contribution). Let's consider the typical relative contributions of the listed gases:
| Gas | Symbol | Approximate Relative Contribution to Global Warming |
|---|---|---|
| Carbon dioxide | \( \text{CO}_2 \) | ~60% |
| Methane | \( \text{CH}_4 \) | ~20% |
| CFCs (Chlorofluorocarbons) | Various | ~14% |
| Nitrous Oxide | \( \text{N}_2\text{O} \) | ~6% |
Based on these approximate contributions, we can arrange the gases in descending order of their relative impact:
- Carbon dioxide (highest contribution)
- Methane
- CFCs
- Nitrous Oxide (lowest contribution)
Now, let's map this order back to the labels given in the question:
- a. Carbon dioxide
- b. Methane
- c. CFCs
- d. Nitrous Oxide
The descending order is therefore a, b, c, d.
Comparing this order to the options provided, we find that the order a, b, c, d corresponds to one of the choices.
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