Reuters: Sturdy cedars perched high in the mountains stand for many Lebanese as symbols of their fractured land’s survival. But some environmentalists worry that the trees face a new threat from global warming. “The biggest challenge now for the cedars of Lebanon is climate change,” said Nizar Hani, scientific coordinator of the Barouk Cedar Nature Reserve in the Shouf mountains. Only murmuring insects and breezes rustling through cedar branches disturb the stillness of the …