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，热喀斯特现象大出现，埋藏于地下的（甲烷等）温室气体可能散发到大气。

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.

随着永久冻土带分崩离析，热喀斯特现象大出现，埋藏于地下的（甲烷等）体可能散发到大中。

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，热喀斯特现象大出现，埋藏于地下（等）温室气体可能散发到大气中。

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，热喀斯特现象大出现，埋藏于地下的（甲烷等）温室气体可能散发到大气中。

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，热喀斯特现象大出现，埋藏于地下的（甲烷等）气体可能散发到大气中。

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，热喀斯特现象大出现，埋藏于地下的（甲烷等）温室可能散发到大中。

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崩离析，热喀斯特现象大出现，埋藏于地下的（甲烷等）温室气体可能散发到大气中。

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，热喀斯特现象大出现，埋藏于地下的（甲烷等）温室气体可能散发到大气中。

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，热现象大出现，埋下的（甲烷等）温室气体可能散发到大气中。