Plenty of studies have shown that the Arctic is warming and that the ice caps are melting, but how does it compare to the past, and how serious is it?
Measuring how fast the Greenland ice sheet is losing mass is logistically and financially challenging.
Greenland glaciers aren't just melting; they are falling apart, driven by warming ocean currents as well as warming air.
Deforestation is not seen as a cause for snow loss on Kilimanjaro.
Mesh fences are harnessing water from fog to provide a lifeline to small impoverished communities.
July's record-breaking scorcher hit Greenland hard this month, melting 97 percent of the surface ice cover to some degree in just a few days.
A team in Peru is fighting glacier loss by painting the Andes Mountains white.
Greenland and Antarctica are losing ice more rapidly every year and out pacing melt from glaciers.
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