I just googled Athabasca glacier (looks nice btw), and found on Wikipedia,
"The Athabasca Glacier is one of the six principal toes of the Columbia Icefield, located in the Canadian Rockies. Due to the warming climate, the glacier has receded more than 1.5 km in the past 125 years and lost over half of its volume. It currently recedes at a rate of 2-3 metres per year"
You begin to realise the seriousness when they put it like that!
I saw a couple pictures in one of the museums in chamonix a while back too of the mer de glace from there a hundred or so years back and the glacier today. An eyebrow-raising moment!