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，斯特现象大出现，埋藏于（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，藏于地下的（甲烷等）温室气体可能散发到气中。

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）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）温室气体可能散发到大气中。