San Francisco chokes on toxic air as wildfires rage

Schools and tourist attractions across the San Francisco Bay Area were shut Friday as smoke from California's deadliest ever wildfire a three hour drive away produced air quality levels worse than in polluted megacities in ...

Pacific's Palau forces tourists to sign eco-pledge

Visitors to the tiny Pacific nation of Palau are being made to sign a promise to respect the environment, in an innovative move that authorities hope will curb ecological damage caused by booming numbers of tourists.

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