Video: How green is Apple?

Tim Cook responds to criticism from environmentalists with a video message of his own.

FORTUNE -- Apple (AAPL) continues to come under pressure from environmentalists and human rights groups to clean up its act.

Currently making the rounds on college campuses is filmmaker Heather White's Who Pays the Price, a 9:30-minute video that begins in the style of a soft-voiced Apple promo ("This is...