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Tundra is melting because of global warming. As it melts it releases methane that has been locked in the ice. Methane is a powerful greenhouse gas that adds to others already in the atmosphere. So global warming gets worse. This is an example of positive feedback.

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8y ago
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14y ago

hotter and dryer summers make it hard for plant and animal life

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11y ago

The taiga is melting, releasing methane, a very powerful greenhouse gas.

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Q: What factors affect the taiga biome?
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