Does pollution cause brain damage?

Time to move to the arctic? A new study in southern California finds that smoggy air can injure more than your heart and lungs

All of those cars sitting in traffic on Interstate 405 in southern California are polluting the air, and potentially causing brain damage, say researchers.
(Image credit: Corbis)

Clogged highways have already been linked to heart and lung problems, but in case you needed another reason to hate traffic, here it is: New research says car pollution on southern California's freeways might be causing brain damage in commuters and people who live near the roads. Here's a concise guide:

What exactly did the researchers discover?

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