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The rugged, remote region was hours from any towns, and featured low-lying hills, steep alpine cliffsides, and "even glaciated terrain", he said.

However, he emphasizes that the measurements cannot distinguish between methane from glaciated regions and methane from wetlands.

Taiwan's central mountain range is one of the steepest landscapes on Earth and has one of the highest erosion rates of any place outside glaciated or human-influenced areas, Carr said.

It used to be that the prime climbing season on glaciated Cascade peaks fell reliably between June and September.

“It was such an amazing experience — going up a heavily glaciated peak, having to use a rope, crampons and an ice ax to get to this awesome viewpoint and look down at other peaks.“