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Read the following passage about methane:
Methane is a colorless, odorless gas that occurs naturally as a result of the decomposition of plant and animal matters. Methane is a hydrocarbon like coal and oil, and it’s all that remains of long-dead plants, dinosaurs, and other prehistoric animals. Although methane can be produced by volcanic activity, scientists usually connect the presence of methane with the presence of biological life. Many microorganisms excrete methane as a waste product, and scientists often infer the presence of these creatures by measuring the amount of methane in the air
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| Post dates | Users | rates | Contents |
|---|---|---|---|
| 2019-09-22 | bishoy | 66.00 | Check this speaking |
| 2019-09-22 | bishoy | 61.00 | Check this speaking |
| 2019-09-22 | bishoy | 70.00 | Check this speaking |
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