‘Luxury water’ for £80 a bottle? It’s ignorant, insensitive and irresponsible

Limited edition water harvested from melting polar icebergs, is now on sale at Harrods. It’s just another ugly indicator of our world’s many inequalities

This is the polar bear capital of the world, but the snow has gone

Canada’s Hudson Bay is as ice-free in November as on a summer’s day and polar bears could be extinct here by mid-century. If the bears are in trouble, so are we

Large cruise ship voyage through Arctic ice rekindles rows

Campaigners say Crystal Serenity trip puts at risk very environment tourists are travelling to see in Northwest Passage

Polar bears face starvation as unlikely to adapt to a land-based diet, says report

New research casts doubt on the theory that polar bears could survive habitat loss as sea ice declines by foraging for food on land

Antarctic ice shelves are melting dramatically, study finds

Melting of floating ice shelves around the continent is accelerating, potentially unlocking extra sea level rise from larger ice sheets jammed behind them

Emma Thompson in the Arctic with Greenpeace: ‘There are more good-looking men on this boat than any place I have ever been’ – video

Actor Emma Thompson has gone on an expedition with Greenpeace to raise awareness of the dangers of drilling for oil. She doesn’t want to tweet, but Stephen Fry has told her to ‘get a grip’. It’s freezing cold, Greenpeace keep asking her to pose for pictures on icebergs and her Arctic gear makes her ‘look like a sofa’. Here is her adventure

• Read an interview with Emma Thompson in the Guardian’s Weekend magazine on Saturday