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September 09, 2011 — Welcome to the new era of "megafires," which rage with such intensity that no human force can put them out. Their main causes, climate change and fire suppression, are fueling a heated debate about how to stop them.

September 06, 2011 — With the clock running out in January, the Bush administration, ignoring the concerns of its own scientists and possibly breaking federal law, looks to open a vital stretch of Arctic habitat to offshore oil and gas drilling. So