Director-producer Davis Guggenheim (HBO's "Deadwood") captures former Vice President Al Gore in the midst of waging a passionate campaign -- not for the White House, but for the environment. Laying out the facts of global warming without getting political, Gore makes a sobering impression in this Oscar-winning doc on the audiences who hear his message, urging them to act "boldly, quickly and wisely" ... before it's too late to act at all.

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