Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.

随着永久冻土带消溶和分崩离析，热喀斯特象大，埋藏于地下的（甲烷等）温室气体可能散发大气中。

Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.

随着永久消溶和分崩离析，热喀斯特现象大量出现，埋藏于地下的（甲烷等）温室气体可能散发大气中。

Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.

随着永久冻土带消溶和分崩离析，热喀斯特象大量出，埋藏于地下的（甲烷等）温室气体可能散发大气中。

Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.

随着永久冻土带消溶和分崩离析，热喀斯大量出，埋藏于地下的（甲烷等）温室气体可能散发大气中。

Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.

随着永久冻溶和分崩离析，热喀斯特现象大量出现，埋藏于地下的（甲烷等）温室气体可能散发大气中。

Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.

着永久冻土带消溶和分崩离析，热喀斯特现象大量出现，埋藏于地下的（甲烷等）温室气体可能散发大气中。

Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.

随着永久冻土带消溶和分崩离析，热喀斯特象大量，藏于地下的（甲烷等）温室气体可能散发大气中。

Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.

随着永久冻土带消溶和分崩离析，热喀斯特现出现，埋藏于地下的（甲烷等）温室气体可能散发气中。

Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.

随着永久冻土带消溶和分崩离析，热喀斯特现象大量出现，埋藏于地下的（甲烷等）体可能散发大中。