Although the melting in itself is a troubling indicator of a warming planet, the bigger concern is invisible: The lakes are emitting huge amounts of methane as ancient plant and animal remains thaw and decompose underground.
Although the melting in itself is a troubling indicator of a warming planet, the bigger concern is invisible: The lakes are emitting huge amounts of methane as ancient plant and animal remains thaw and decompose underground.
尽管它们的溶化是全球变暖的标志，但最大的担忧是一种无形的危险物质：随着地下远古动植物解冻并腐坏，这些湖会喷出大量甲烷。