General : Blue glacial ice.

Glacial ice often appears blue as in this picture of the Alaskan Mendenhall glacier from May 2011. The reason is that

Extreme weather melts 10 per cent of Swiss glaciers

Marble Caverns On Lake General Carrera In Chile Stock Photo

Why is glacier ice blue?

Blue Glaciers, Blue Icebergs and the Antarctic Museum of Modern

Coordinated action urgently needed to face rapid polar changes

Introduction to Glaciers — Earth@Home

Icebergs Can Be Green, Black, Striped, Even Rainbow [Slide Show]

Can $500 Million Save This Glacier? - The New York Times

Why Are Glaciers Melting from the Bottom? It's Complicated

Why is glacier ice blue?