The successful auction of 12.5 million permits by 10 U.S. Northeastern states brought the cap-and-trade system to the limelight this week.
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Get up close and personal with the natural world with these amazing photos.
Use this list to clean without spreading toxic chemicals around your home.
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Photographer Daniel Beltrá's shocking visual journal of the disaster.
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Toast your grad's entry into the big wide world with durable, useful gifts.
