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Lung Cancer

Toxic Kenya dump embodies pope's environmental concern

Using hooks or their bare hands, men, women and children traipse through the murky sludge that pools around the mountains of garbage, hunting for bottles, plastic bags and anything else that can be recycled to earn themselves enough for their daily bread.

The scavengers at Nairobi's notorious Dandora dump are some of the poorest of Kenya's poor — and they are likely to be on Pope Francis' mind when he makes his first trip to Africa Thursday to bring his message of environmental stewardship and care for society's most marginalized. His message will take on an even more poignant ring on a continent long wracked by poverty, war and disease.

One of Francis' most...