BBC Five Live's Stephen Chittenden reports from Alaska on people's attitude to polar bears, now listed as a threatened species.

Seven days on from Alaska Governor Sarah Palin's eruption into the arena of US presidential politics, we look at 10 things we've found out about the Republicans' vice-presidential nominee.

Data from a Greenland ice core indicates that coal burning is the prime source of heavy metal pollution in the Arctic.

An explorer starts the second leg of a 3,000-mile (4,827 km) journey to assess the impact of climate change in the Arctic.

As Starbucks sees its US sales fall further, what has gone wrong at the coffee giant and how can it transform its fortunes?

Remarkable new footage of Canada's Arctic wolves is caught on camera by a BBC film crew.

Sea erosion brings an urgency to archaeologists' work, as bodies emerge on the shoreline of northern Alaska.

The Arctic is being hit by melting ice, hotter air and dying wildlife, a US report on the impact of global warming says.

It is time for the industrialised world to change its behaviour before the Arctic, its people and its wildlife are lost forever.

Three men are arrested and 145 cannabis plants are seized in raids on two properties in Cambridgeshire.

Arctic explorer Jim McNeill writes about his experiences searching for Arctic wolves.

Some chemicals should be re-assessed after new evidence that they accumulate in food chains, scientists say.

Arctic explorer Jim McNeill writes about his experiences searching for Arctic wolves.

Top sporting images from around the world

Legislation is introduced in the US to try to make a ban on drilling in an oil-rich Alaskan wildlife refuge permanent.

BBC reporter Doreen Walton lives with an Inupiat family in Barrow, Alaska, to see how climate change is affecting their lives.

An oil spill at Prudhoe Bay field is confirmed by US officials as the largest ever on Alaska's North Slope region.

Trillions of barrels of oil in the sands of Canada's Alberta province could hold the key to future energy needs, Peter Day discovers.

The US Senate narrowly derails an attempt to allow oil drilling in Alaska's Arctic National Wildlife Refuge.

The US House of Representatives passes a provision allowing oil drilling in Alaska's Arctic National Wildlife Refuge.