| the atmosphere | 0.52 |
| the water | 0.33 |
| association | 0.31 |
| remain in the atmosphere | 0.67 |
| produce carbon dioxide | 0.60 |
| escape into the atmosph… | 0.59 |
| enter the atmosphere | 0.56 |
| break down in the atmos… | 0.53 |
| dissolve in the water c… | 0.50 |
| generate electricity | 0.50 |
| leak into the atmosphere | 0.48 |
| turn greenhouse gas emi… | 0.48 |
| combine with water | 0.47 |
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| carbon | 0.43 |
| large effect | 0.40 |
| short lifetime | 0.39 |
| a global warming potent… | 0.36 |
| greater effect | 0.34 |
| half life of seven years | 0.30 |
| immediate effect | 0.25 |
| lower vapor pressure | 0.25 |
| many sources | 0.25 |
| high temperatures | 0.25 |
| more potent than carbon… | 0.62 |
| more potent | 0.60 |
| biological | 0.53 |
| potent | 0.53 |
| thermogenic | 0.50 |
| stable | 0.49 |
| flammable | 0.43 |
| important | 0.42 |
| odorless | 0.41 |
| abundant | 0.41 |
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| change | 0.16 |
| gas | 0.61 |
| potent greenhouse gas | 0.59 |
| main component of natur… | 0.57 |
| natural gas | 0.57 |
| a greenhouse gas | 0.56 |
| colorless, odorless gas | 0.45 |
| a fossil fuel | 0.44 |
| a chemical compound | 0.44 |
| important greenhouse gas | 0.43 |
| unstable gas | 0.40 |
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| released | 0.73 |
| produced | 0.68 |
| produced by cow | 0.65 |
| released into the atmos… | 0.64 |
| used as fuel | 0.63 |
| burned | 0.60 |
| extracted | 0.59 |
| produced by microbe | 0.58 |
| stored | 0.57 |
| emitted | 0.57 |
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