Climate concerns writ large on glacier

ALETSCH GLACIER, Switzerland - Kids across the world expressed concerns about global warming by joining forces to create what organizers say is the world's biggest postcard on a glacier in the Swiss Alps.

Bearing messages of hope and commitment, more than 125,000 colorful and handwritten postcards from kids around the world have emblazoned a glacier in Switzerland to create one giant one, half the size of a football field.

It's a cry for help - from New Orleans to Hong Kong, from sub-Saharan Africa to India - ahead of an upcoming United Nations-backed climate conference in Poland next month.