We all have a food footprint, but what foods create greenhouse gases? Craig Reucassel looks at different carbon footprints of the various foods we eat, and learns about the importance of where our food actually comes from.
Off Australia's northeast coast lies a wonder of the world, a living structure so big it can be seen from space, more intricate and complex than any city, and so diverse it hosts a third of all fish species in Australia. The Great Barrier Reef as we know it -- 8,000 years old and home to thousands of marine species -- is dying in our lifetime.
In the Vega Archipelago, in the north of Norway at the Arctic Circle, people have formed a unique partnership with wild eider ducks. The provide the birds with shelter in hatcheries, and in return, after the breeding season, collect the precious eiderdown, with which the ducks line their nests.
No season brings more surprises than an Alaskan summer. It lures hummingbirds up from the tropics, exposes deserts in the Arctic and relies on parachuting firefighters to tackle forest fires in its vast wilderness. Summer is a narrow window of plenty, when the land is bathed in 24-hour sunlight - but in this land of extremes, you can have too much of a good thing.