Melting icebergs triggering glacier earthquakes

Ice falls from the Perito Moreno Glacier in Santa Cruz province, Patagonian southern Argentina , some 3,200 kilometers, (2,000 miles) south of Buenos Aires, Thursday, Oct.16, 2003. A study suggests, that melting of glaciers in the Patagonian ice fields of southern Argentina and Chile has doubled in recent years, caused by higher temperatures, lower snowfall and a more rapid breaking of icebergs. (Natacha Pisarenko/ AP Photo )

"We had over a hundred glaciers," said Montana Gov. Brian Schweitzer, who took ABC News for a helicopter tour of Montana's Glacier National Park. "Now we're down to a couple dozen, and by 2025, 2035 at the rate that they've been declining, there will be no glaciers in Glacier National Park."

It's not surprising there's been such disagreement and confusion about global warming, because in one sense it's the biggest problem we've ever faced. It's affecting the whole planet, and all at once.

The latest studies report what we cannot see — some deep ocean currents, normally icy cold, are beginning to warm up.